21. Defense attorneys have occasionally argued that their clients' misconduct stemmed from a reaction to    something ingested, but in attributing criminal or delinquent behavior to some food allergy,the perpe­trators are in effect told that they are not responsible for their actions.

A)  in attributing criminal or delinquent behavior to some food allergy

(B)   if criminal or delinquent behavior is attributed to an allergy to some food

(B)   if criminal or delinquent behavior is attributed to an allergy to some food

(C)  in attributing behavior that is criminal or delinquent to an allergy to some food

(D)  if some food allergy is attributed as the cause of criminal or delinquent behavior

(E)   in attributing a food allergy as the cause of criminal or delinquent behavior

OG21 很明显，their 和they/their指代不一样，这样的情况我碰过几回，给我在解题中带来困绕，

究竟什么时候代词指代要一致？

什么时候又可以分别指代不同的对象？

谢谢！！