Final answer:
The most dangerous form of skin cancer is Melanoma (C) because it can metastasize and spread to other organs, causing the majority of skin cancer deaths.
Step-by-step explanation:
The most dangerous form of skin cancer is C) Melanoma. Melanoma originates from the melanocytes, the melanin-producing cells in the epidermis. Although it is the rarest form of skin cancer, melanoma is highly malignant and has a high risk of metastasizing, which can cause it to spread to other parts of the body rapidly.
Basal cell carcinoma is the most common type and usually does not metastasize, which makes it less dangerous in comparison. However, melanoma causes the vast majority of skin cancer deaths due to its aggressive nature. Early detection and treatment of melanoma are crucial for improving survival rates.