An assertion (A) and a reason (R) are given below.

Assertion (A): Forest cover in the country has gradually decreased.

Reason (R): Encroachment by humans is one of the concerns for the forest department.

Choose the correct option.

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

B. Both A and R are true, but R is not the correct explanation of A

C. A is true, but R is false

D. A is false, but R is true