You will be given a definition of a task first, then some input of the task.
You are given a science question (easy-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.

Scientists often work together to solve a problem. Sometimes they work in laboratories. Sometimes they are outside doing fieldwork. The chart provides a list of some careers in science. Which scientists might work together to save a polluted wetland?
(A) chemist, botanist and ecologist (B) astronomer, ecologist and physicist (C) physicist, paleontologist and chemist (D) botanist, astronomer and paleontologist
Output:
A