An 11-Year-Old Boy with Skin Lesions on His Trunk Characteristic

An 11-year-old boy with skin lesions on his trunk characteristic of ringworm has been brought to the family's primary care provider by his mother. Which of the following aspects of the clinician's assessment relates most directly to the suspected diagnosis?

A) Previous infection with other parasitic worms
B) Potential contact with the fungus from pets or other children
C) Allergic reactions to drugs and environmental substances
D) The child's infant immunization history