Complicated SAT writing questions

HogHans
Wed, 23 Sep 2009 22:56:06 +0000

A poetic form congenial to Robert Browning was the dramatic … a character’s mind without the simplifications demanded by stage production
{I was wavering between these two choices}
(B) monologue, which let him explore
(C) monologue that lets him explore

:Why is B correct. isnt the subject singular (poetic form) ??