TASK DEFINITION: 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.
PROBLEM: In which of these organs does most absorption of nutrients take place?  
 (A) liver (B) stomach (C) small intestine (D) large intestine

SOLUTION: C

PROBLEM: While Anna was testing a circuit, she dropped a light bulb. What is the safest thing Anna can do?  
 (A) get a new bulb to finish the test (B) push the broken glass under a table (C) tell her teacher that she broke the bulb (D) ask her partner to help pick up the broken glass

SOLUTION: C

PROBLEM: Capillary walls are only one layer of cells thick. Passage of oxygen into and out of the capillaries is controlled most by which process?  
 (A) collection of waste material (B) breakdown of materials (C) diffusion of material (D) storage of materials

SOLUTION:
C