Which synonym of young has the most positive connotation

I'd have to say either youthful or spry.

Explanation:

Spry is usually associated with liveliness and vigor.  

A. beautiful

Explanation:

because I did the test and got a 100% on E D G E N U I T Y

the apollo program, also known as project apollo, was the third united states human spaceflight program carried out by the national aeronautics and space administration (nasa), which succeeded in landing the first humans on the moon from 1969 to 1972.

because most jews were in the concentration camps and dying horrible deaths while anne could be with her family in a warm place with shelter, food, water, and a place to sleep.