PT 64 S4 Q17

How does the purpose of passage B relate to the content of passage A?

How does the purpose of passage B relate to the content of passage A?
(A) The author of passage B seeks to support the main claims made in passage A by presenting additional arguments in support of those claims.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Oct 2011 LSAT (PT64): Reading Comprehension