问题
me students, professional training might be the way to go since well-developed skills, _______ , can be the difference between having a job and not.
A:all other factors are equal
B:all other factors to be equal
C:all other factors being equal
D:if all other factors being equal;
B:all other factors to be equal
C:all other factors being equal
D:if all other factors being equal;
正确答案是：
