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.

Russell wants to observe changes in nature over the next few months. What can a thermometer help Russell investigate?  
 (A) rainfall amounts each week (B) tiny organisms in pond water (C) the high temperatures each day (D) the amount of growth in a plant
C

Which is a major difference between the life cycles of different types of plants?  
 (A) the way they die (B) the energy they use (C) the way they reproduce (D) the way they make food
C

The students watch ocean waves crash on a beach. Which statement describes what will most likely happen because of the waves?  
 (A) Grass on the beach will grow longer. (B) Sand from the beach will wash away. (C) Salt from the ocean will be left on the beach. (D) Currents in the ocean will become stronger.

B