Is there a lesson in the core curriculum that goes over sub-conclusions and major premises in detail?

The use of "usually" threw me off a little bit and got me thinking, could "often" be interpreted the same way as "some" in certain cases? For example "Cars are often driven through mud."

Could this be expressed C DTM ?

Which would read both as "Some cars drive through mud", and as "some things that drive through mud are cars".

Just wondering.

I chose answer choice C based off of the language used in the stimulus, which stated that Ptolemy's theory "struck Copernicus as unlikely." I felt that this indicates the use of intuition.