For flexible resources, which of the following statements is true?

A change in resource spending will only occur if the demand for a resource drops permanently and exceeds demand enough so the activity capacity will be reduced.
	B.	Decisions often affect multi-period capabilities.
	C	If the demand for an activity changes across alternatives, then resource spending will change and the cost of the activity will be relevant to the decision.
	D	Often, resources are acquired in advance for multiple periods and are therefore irrelevant.