Help with 5.

. CENTRE Assignment Booklet 7 Unit D 1 5. A child runs into school after playing tag on the playground. The child returns with a red face. This can be explained by A. extracellular fluid that has leaked from the lymph vessels B. vasodilation of blood vessels to allow heat loss through the skin C. the increase in red blood cells due to exercise D. vasoconstriction of blood vessels to allow heat loss through the skin