People Fighting Forest Fires Carry Emergency Tents That Have Shiny

People fighting forest fires carry emergency tents that have shiny aluminum outer surfaces. If there is trouble, a fire fighter can lie under the tent to block the heat from burning trees overhead. The tent helps because

A) conduction carries heat downward toward the fire fighter and the aluminum tent conducts that heat harmlessly into the ground.
B) radiation carries heat downward toward the fire fighter and the aluminum tent reflects most of that radiation.
C) convection carries heat downward toward the fire fighter and the aluminum tent blocks most of the heat carried by convection.
D) both conduction and radiation carry heat downward toward the fire fighter and the aluminum tent blocks most of that heat.