You are given a science question (hard-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.

A simple food chain includes hawks, lizards, and insects. Which will most likely happen to the lizard and hawk populations if a pesticide is sprayed to kill the insects, and the lizard and hawk populations cannot find other food in this ecosystem?
(A) Both the lizard population and the hawk population will increase. (B) Both the lizard population and the hawk population will decrease. (C) The lizard population will increase, but the hawk population will decrease. (D) The lizard population will decrease, but the hawk population will increase.
B