[quote="gluon"]Teachers in this country have generally been trained either
to approach mathematics like a creative activity or that they should force students to memorize rules and principles without truly understanding how to apply them.
A> to approach mathematics like a creative activity or that they should force students to memorize rules and principles
B> to approach mathematics like a creative activity or to force students to memorize rules and principles
C> to approach mathematics as a creative activity or to force students to memorize rules and principles
D> that they should approach mathematics as a creative activity or to force students to memorize rules and principles
E> that they should approach mathematics like a creative activity or that they should force students to memorize rules and principles
I narrowed down the answer to either B or C. But the OA is C. So now the question is why is 'as' the correct word for comparison?[/quo
te]
Well D E should be eliminated because either that is correct idiom. Between B and C , C should be obvious choice because use of "like" is not correct usage here.