请选择ABCD/R/O/[0^/~'a4f9E)k He is indifferent _________ hardships and dangers.,r0v5t:k:a3l.p:k,?)I'|6?8K
A.of,r0v5t:k:a3l.p:k,?)I'|6?8K
B.at,r0v5t:k:a3l.p:k,?)I'|6?8K
C.in,r0v5t:k:a3l.p:k,?)I'|6?8K
D.to,r0v5t:k:a3l.p:k,?)I'|6?8K