To prevent the spread of flames caused by a grease spill on the stove or in the oven, use a fire extinguisher or throw (a. baking soda b. baking powder c. water d. flour) on the fire source

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.