Which epithelial membranes line the body cavities and cover organs that lie in them, that are not open to the exterior of the body?

A. Increase the size of body structures: While tissue growth can contribute to body size, its primary function is not just increasing size but carrying out specific physiological roles.

B. Perform common functions: Tissues consist of similar cells that work together to perform specific functions, such as muscle contraction, nerve signaling, or support.

C. Deliver messages: Only nervous tissue specializes in transmitting messages, but other tissues have different functions.

D. Fight against diseases: The immune system fights diseases, but not all tissues are involved in this function.

A. Scars from a severe burn: Although burn scars may increase skin sensitivity and vulnerability, they are not a primary cause of skin cancer.

B. Exposure to environmental pollutants: Some pollutants may contribute to skin damage, but UV radiation is the primary cause of skin cancer.

C. History of viral illness: Some viruses, such as HPV, are linked to specific cancers (e.g., cervical cancer), but they are not a primary cause of skin cancer.

D. Sun exposure: UV radiation from the sun is the most significant risk factor for skin cancer, particularly basal cell carcinoma, squamous cell carcinoma, and melanoma.