Compared to the Muscles of Young Adults,the Muscles of Elderly

Multiple Choice

Compared to the muscles of young adults,the muscles of elderly people​ 

A) contain fibers that are more angular than round. 
B) show a more even distribution of slow and fast twitch fibers. 
C) are more likely to be hybrids of fast and slow twitch fibers. 
D) are more likely to be made up of slow twitch fibers.