Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): The problem of organic in rivers is usually worse in hot summer months.
Reason (R): Higher water temperatures exacerbate oxygen depletion.
In the light of the above statements, choose the most appropriate answer from the options given below:

A. Both (A) and (R) are true and (R) is the correct explanation of (A)

B. Both (A) and (R) are true and (R) is the NOT correct explanation of (A)

C. (A) is correct but (R) is not correct

D. (A) is not correct but (R) is correct

Answer: Option A