Self-study
Since 1989 the importation of ivory from African elephants into the United States and Canada has been illegal, but the importation of ivory from the excavated tusks of ancient mammoths remains legal in both countries. █████████ ███ ████ █████ ███ █ █████ ████████ ██ ███ ███████████ ██ █████ ████ █████████ ██████████ ██ ███████ ██████ ██ ████ ███████ █████████ ██████ █ █████████ ███ ██████████████ ████████ █████ ████ ████ ██ █████████ ████ █████ ████ █ █████████ ███ ████████ ███ ███ ███ ██ ███████ █████████ ██████ ██████ ██████ █████ ███ █ ████████ ████████ ██ ███ ██████ ██ █████ █████████ ███ ███████████ ████ ███ ████ ███ ██████ ████ ███ ██████████ ██ █████████ ██ ███████ ██████
Summary
Since 1989, importing ivory from African elephants into the US and Canada has been illegal. But, importing ivory from ancient mammoths is legal. Following the 1989 ban on importing elephant ivory, there was a sharp uptick in ivory imports labeled as mammoth ivory. However, once a technique was developed to reliably distinguish between elephant and mammoth ivory, there was a dramatic decline in the amount of imported ivory labeled as mammoth ivory.
Strongly Supported Conclusions
Before the technique to distinguish between the two types of ivory was introduced, much of the ivory labeled mammoth ivory was actually elephant ivory.
3.
Which one of the following ██ ████ ████████ █████████ ██ ███ ███████████ ██████
a
Customs officials still ██████ ████████ ███████████ ████████ █████ ████ ███████ ██████
This is antisupported. The stimulus says that a technique was discovered and widely known.
b
Most of the █████ █████████ ████████ ████ ███ ████ ███ ██████ █████ ████ ███████ ███████ █████████ ███ █████████
The stimulus does not provide information about the current sources of most ivory imports.
c
In the period █████ ███ █████████ ███ ██████████████ ████████ █████ ████ ███████ █████ ███ ████████████ ███ ██████████ ██ ███████ █████████ ███ █████████
The stimulus does not give any information about the population of elephants. You need a few assumptions to make this work.
d
Much of the █████ ████████ ██ ███████ █████ ████ █████ ███ ███ ██ █████ ████ ███████ █████████ ████ ████ ██████ ███ ████████ ████████ ██████
The stimulus explains that following the ban, there was a significant increase in mammoth ivory imports and a massive decrease once a technique to distinguish between the two ivories was implemented. You can assume that many ivory imports were mislabeled to get around the law.
e
Shortly after the ███████████ ██ █████ ████ ███████ █████████ ███ █████████ █████ ███ █ █████ ████████ ██ ███ █████ ██████ ██ ███ █████ █████████ ███ ███████████ ████ ███ ████ ███ ███████
The stimulus says that there was a massive increase in mammoth-labeled ivory, not an overall increase in the total amount of ivory imported.