HELP ME PLS If you do the unit review, you will do well on the test.
If you do well on the test, then you will do well in the course.
Therefore, if you do the unit review, then you will do well in the course.

A. This conclusion was drawn using the law of detachment
B. This conclusion was drawn using the law of contrapositive
C. This conclusion was drawn using the law of syllogism
D. An invalid conclusion was made