The Primary Reason for Generating, Transmitting, and Distributing Alternating Current

The primary reason for generating, transmitting, and distributing alternating current is because

A) there are more applications for a.c. than for d.c.
B) its voltage levels may be changed easily using transformers
C) a.c. has lower losses than d.c.
D) a.c. is generally safer than d.c.