instruction:
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.
question:
Andre learned that plants survive through a process called photosynthesis. Which substance do plants produce during photosynthesis?  
 (A) minerals (B) nitrogen (C) soil (D) sugar
answer:
D


question:
Cells come in two basic types, prokaryotic and eukaryotic. Which cell structure is found in both prokaryotic and eukaryotic cells?  
 (A) vacuole (B) nucleoid (C) mitochondrion (D) cytoplasm
answer:
D


question:
A scientist found a fossil of an organism that had gills. When the organism was living, the area in which it lived was most likely covered by ___.  
 (A) forest (B) grassland (C) bare rock (D) water
answer:

D