Successful collaboration between or among nonprofit organizations must be built on a foundation of

The answer is: Trust

Non-profit organizations were established to fight for a common good rather than for profit.

This mean that when more than one nonprofit organizations work together, they tend to skipped various costly legal formalities that usually made to protect organization's interest and not lose its profit. Because they overlook this, they need to build a foundation of trust in their relationship.

no the answer is c only objects touching the earth's surface can be acted upon by an outside force

a would be the answer