After 1995, of the adults 65 and older in the workforce, those rose substantially.

The answer that will fill in the blanks is that engaging in full-time work. It is because it has been found out that after the year of 1995, the adults who aged sixty five years older and above in the place of workforce has resulted a rose substantially when they engage in having to work full time.

c it has to be i googled it

answer; observing;