"which microorganism most commonly causes athlete's foot? "

Athlete's foot (tinea pedis) is a fungal infection of the skin of the foot. Most athlete's foot is caused by one of two types of fungus. Trichophyton mentagrophytes often causes toe web or vesicular (blisterlike) infections. 

The correct answer is c

The soviet union beat the us to the first successful launch, with the october 4, 1957, orbiting of sputnik 1, and later beat the us to have the first human in earth orbit, yuri gagarin, on april 12, 1961. the "race" peaked with the july 20, 1969, us landing of the first humans on the moon with apollo 11