如果不是从联通订购的IPHONE，如何设置参数（上网、彩信）？

Resource leveling attempts to ______.

A) reduce resource requirements by smoothing out period-to-period resource assignments
B) ensure that the budget abnormalities are overcame
C) reduce the amount of resources so that they can be shared with on other endeavors
D) increase the amount of the project manager's authority so that budget dollars can be appropriated