The ______ is the principal standard against which nonprofit performance should be measured.

A) charter
B) business plan
C) mission statement
D) core values statement

The mission statement outlines the purpose and goals of the nonprofit organization and is the guiding principle for their actions and decision-making. It is the standard against which nonprofit performance should be measured. The charter and business plan are important documents, but they are more focused on the legal and operational aspects of the organization. The core values statement is also important, but it is more reflective of the organization's culture and beliefs rather than a measurement of their performance.