Many People Can Get an Infection Called Ringworm, Which Isn't

Multiple Choice

Many people can get an infection called ringworm, which isn't a worm but a fungus. The characteristic growth pattern is a circle on the infected portion of the skin. The edges of the circle tend to appear redder, or more irritated, than the center. Where did the infection begin?

A) It began at the margins of the circle where it is most irritated, and the fungus grew around the margin of the circle.
B) It began at the center of the circle, and the fungus grew out from the initial point of infection.
C) Multiple fungal spores landed in the shape of the circle and led to infection.