If a fair-skinned person is sunburned, why does his or her skin turn red

A) The number of red melanocytes in the skin increases
B) The blood flow to the skin increases
C) Melanocytes increase production of red pigments
D) Increased heat causes the skin to turn red
E) Blood supply to the skin decreases

B
The sunburn damages the skin causing an inflammatory response. This causes the capillaries (little blood vessels) to dilate or enlarge which increases blood flow to the skin so more white blood cells can come in and clean up the dead cells from the burn.

D. The skin is basically cooked and it will turn red as a reaction to the damage. A sunburn is a first degree burn, unless it also blisters, then it's a second degree burn.

d