Here are two lines taken from The Merchant of venice：“Not on thy sole，but on thy soul，harsh Jew Thou mak’st thy knife keen.”What kind of figurativedevice is used in the above lines？

Here are two lines taken from The Merchant of venice：“Not on thy sole，but on thy soul，harsh Jew Thou mak’st thy knife keen.”What kind of figurativedevice is used in the above lines？
A、Simile
B、Metonymy.
C、Pun.
D、Synecdoche.
正确答案：C