In general, subjective well-being:
A. decreases in older age.
B. increases for older men and decreases for older women.
C. increases for older women and decreases for older men.
D. increases in older age.

A. decreases in older age.

Explanation:

In the life of every living thing on earth, there overall well being varies from individual to individual. It is also caused as a result of various factors such as good feeding, lifestyle, health conditions e.t.c.

Generally, the subjective well being of an individual decreses in older age. This is as result of the body system becoming weaker as one gets older. For example, a young person that does 30 push-ups could not be able to do even up to 3 push-ups when he or she is 70years old.

answer; collective security;