the doctor insisted on one of the patient's legsthe doctor insisted on one of the patient's legs____a.being cut offb.to be cut offc,having cut offdto have cut off

the doctor insisted on one of the patient's legs
the doctor insisted on one of the patient's legs____
a.being cut off
b.to be cut off
c,having cut off
dto have cut off

B,insist to do sth / leg 要用被动语态,是被截肢、

b. to be cut off
严格来说， 医生是不会insist 坚持的， 因为是需要病人签署手术同意书consent form
为什么用one of the patient's legs 给人的印象是这个病人有很多只脚， 或是 很多病人们其中的一只脚
应该写 his patient's leg。

句子表达的很暧昧