PT 65 S4 Q18

Hospitals, universities, labor unions, and otherinstitutions may well ... ...

Which one of the following generalizations is most clearly illustrated by the passage?
(A) What is true of some social organizations is not necessarily true of all such organizations.
(B) ...
(C) ...
(D) ...
(E) ...

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