Strong, naive, perfect balance of strong and naive.
I think it’s A blocking pathogen from entering block
C. Is incorrect because some cells don’t survive for more than half a century
Mutagen is an agent that causes DNA mutations. UVA radiation penetrates deep into the skin and acts as a mutagen. UV light is the most common source of radiation that affects DNA, but it is a weak radiation and it penetrates only the surface cells of your skin.