Which type of infection is typically caused by fungi?

Fungal infections commonly affect both the skin and nails, making the choice that includes both options B and C the most accurate. Fungi thrive in warm, moist environments, which is why they can easily infect various parts of the body, particularly the skin and nails.

Skin infections caused by fungi can include conditions such as athlete's foot and ringworm, which manifest as rashes and irritation. Similarly, nail infections, often referred to as onychomycosis, occur when fungi invade the nail bed, leading to discoloration, thickening, and sometimes separation of the nail from the nail bed.

Considering that fungal infections are capable of affecting these two areas specifically, the option that includes both the skin and nails is the best answer.