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 is considered a property of soil?  
 (A) streak (B) fracture (C) texture (D) luster
C

Which of these is a renewable resource found in Nevada?  
 (A) zinc metal (B) gravel deposits (C) petroleum products (D) geothermal energy
D

Two processes are involved in the formation of a sand dune. Which two processes best describe how a sand dune forms?  
 (A) wind erosion then deposition (B) plate movement then deposition (C) wind erosion then water erosion (D) water erosion then plate movement

A