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.

The first person to introduce the idea of the continents moving around the surface of Earth was  
 (A) Niels Bohr. (B) Albert Einstein. (C) Charles Darwin. (D) Alfred Wegener.
D