PT 65 S4 Q13

Educator: Reducing class sizes in our school districtwould require hiring ... ...

Educator: Reducing class sizes in our school district would require hiring more teachers. However, there is already a shortage of qualified teachers in the region. Although students receive more individualized instruction when classes are smaller, education suffers when teachers are underqualified. Therefore, reducing class sizes in our district would probably not improve overall student achievement. Which one of the following is an assumption required by the educator’s argument?
(A) Class sizes in the school district should be reduced only if doing so would improve overall student achievement.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Dec 2011 LSAT (PT 65): Logical Reasoning B