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.

Divergent tectonic plate boundaries most commonly form  
 (A) ocean ridges. (B) ocean trenches. (C) non-volcanic islands. (D) continental mountains.
A

What season is the Northern Hemisphere experiencing when it is tilted away from the Sun?  
 (A) spring (B) summer (C) autumn (D) winter
D

Which type of relationship exists when a certain type of tree's roots need a fungus present in order to grow normally?  
 (A) beneficial (B) competitive (C) harmful (D) infectious

A