list是一个ArrayList的对象，哪个选项的代码填写到//todo delete处，可以在Iterator遍历的过程中正确并安全的删除一个list中保存的对象？( )Iterator it = list.iterator(); int index = 0;while (it.hasNext()){ Object obj = it.next(); if (needDelete(obj)) { //needDelete返回boolean，决定是否要删除 //todo delete } index ++; }
a. list.remove(it.next());
b. list.remove(obj);
c. it.remove();
d. list.remove(index);