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.

Which statement below best explains why several fossils of sea organisms were discovered buried deep in an area of dry land?
(A) The fossils changed locations. (B) The area had a shift in climate. (C) The land was once underwater. (D) A glacier once covered the area.
Output:
C