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 is a MAJOR mistake in the experimental design?
(A) A control group was not used. (B) The same type of pot and soil was used. (C) Each plant received the same amount of water. (D) Too much data will be collected in three weeks.
A