Self-study
Clothes made from natural fibers such as cotton, unlike clothes made from artificial fibers such as polyester, often shrink when washed at high temperatures. ███ ██████ ███ ████ █████████ ██ ████ ███████ ██████ ███ ███████ ██████ ██ █████ ████████ ██████ █████ ███ ███████████ ██ █████ ████████ ████████ ███████ ███████ ██████ ███ ████████████ ████████████ █████ ██ █████ ████ ████ ██████ ████ ████████████ █████ ███ ██████ ██ █████ ██ ██████ ██ █████ ████████ ███████
Summary
Clothes made from natural fibers often shrink when washed at high temperatures. This does not happen with clothes made from artificial fibers. Shrinkage occurs because natural fibers are tightly curled in their original state, but must be straightened before being made into cloth. High temperatures cause all fibers to return to their original states.
Strongly Supported Conclusions
The stimulus supports the conclusion that if straightened fibers that were used to make clothing return to being tightly curled, that causes the clothing to shrink. It also supports the conclusion that artificial fibers are straight in their original state.
12.
Which one of the following ██ ████ ████████ █████████ ██ ███ ███████████ ██████
a
Washing clothes made ████ ███████ ██████ ██ ███ ████████████ ██████ ███ ██████ ██ ██████████ █████████
This answer is unsupported. We don’t know from the stimulus what effect washing clothes at low temperatures may have. We only know that high temperatures cause natural fibers to shrink.
b
High temperatures have ██ ██████ ██ ███ ████████████ ██ ██████ ██ ███████ ████ ████ █ █████ ██ ███████ ███ ██████████ ███████
This answer is unsupported. We don’t know from the stimulus what happens when clothes are made from a blend of fibers.
c
Clothes made from ███████ ██████ ███████ ████ ██████ ████ ██ ███████ ████ ████ ██████████ ███████
This answer is unsupported. We don’t know anything about stretching ability of either type of fiber from the stimulus.
d
If natural fibers ████ ████ ████ ████████████ ███ ████ ███ █████ ███ ██████ ██ █████ ██ ████ █████████████ ████ ██████ ██ ████████████ ██████
This answer is unsupported. We don’t know from the stimulus whether or not it's possible to re-straighten natural fibers that have returned to their original state.
e
Artificial fibers are ████████ ██ █████ ████████ ██████
This answer is strongly supported. We know from the stimulus that artificial fibers do not shrink when washed at high temperatures. We also know that high temperatures cause all fibers to return to their original state. Therefore, artificial fibers must originally be straight.