Given the task definition and input, reply with output. 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.

A beach is formed when sediment is deposited along a shoreline. What would most likely happen if rivers that empty into the ocean were dammed?
(A) Less sediment would be deposited along the shoreline. (B) Beaches would form from different materials. (C) Sand dunes would become smaller. (D) Deltas would become larger.
A