Answer:
A) Activity theory
Explanation:
Activity theory: The activity theory is also known as the normal theory of aging, implicit theory of aging, and lay theory of aging. It signifies the process of successful aging that happens when an adult maintain social interactions and stay active. Generally, this theory opposes the disengagement theory responses.
It is based on the general activity approach and was proposed by L. Vygotsky, A. Leontiev, S. Rubinstein, and A. Luria.