The idiom “bed of dust” is a( ) as far as figures of speech are

The idiom “bed of dust” is a( ) as far as figures of speech are concerned.
A、simile
B、metaphor
C、metonymy
D、personification
【正确答案】:B
【题目解析】:尘土做的床即指坟墓,用的是比喻的修辞手法