Detailed Instructions: 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.
Q: The Florida Fish and Wildlife Conservation Commission (FWC) has helped to develop more than 300 artificial reefs in both the Atlantic Ocean and the Gulf of Mexico. Which is an unexpected negative result of establishing these reefs?
(A) It enhanced recreational and diving opportunities. (B) It enhanced the studying of corals and other organisms. (C) It increased over-fishing and destruction of ecosystems. (D) It increased the number of fish and other aquatic organisms.
A:
C