Which sentence contains a dangling modifier? A. Insulting and predicable, the comedian's monologues attracted fewer and fewer television viewers. B. After studying the habits of pit vipers, the pits, which serve as infrared sensors and enable the snakes to seek heat, evolved to detect danger rather than to hunt prey. C. The deadly snakes, which take their name from the two characteristic pits on their snouts, belong to the family of pit vipers. D. To be quite honest, Axel is a whining nerd and we would prefer that you leave him at home.

The correct answer is B. After studying the habits of pit vipers, the pits, which serve as infrared sensors and enable the snakes to seek heat, evolved to detect danger rather than to hunt prey.

Explanation:

A sentence contains a dangling modifier in the case a modifier (word or words that describe a noun) is not placed beside the noun it modifies, instead, the modifier seems to "dangle" with no noun to modify. This is the case of the sentence B because in this the modifier "After studying the habits of pit vipers" has been placed beside "the pits"; however, it is not supposed pits study themselves and therefore the modifier seems to dangle as it is not placed beside the noun it should modify.