The correct answer is (b.) men's. The men's shouts filled the dark night. If you are referring to many male persons, you may use men. You need not any usage of s with men since men is already in a plural form which makes it wrong.
Iambic Pentameter. It's written in Iambs (sets of one strong followed by one weak syllable), and there are five of these per line (hence pentameter). It's most commonly associated with Shakespeare.
C. <span>". . . the man raised his eyes to the horizon and laughed . . ."</span>
