Matter  is a. the amount of energy contained within an objectb. a measure of the force gravity exerts on objectsc. something that has mass and occupies spaced. a measure of an object's inertial force

When a researcher debriefs her participants, she: provides a detailed explanation of the study. removes their undergarments. tells them they can stop taking part at any time. provides an detailed explanation of the study, and tells them they can stop taking part at any time.