Step 1: Cutaneous (skin) lymphoma is a non-Hodgkin lymphoma of skin-homing lymphocytes. Several independent host factors raise its likelihood, so the task is to check each listed factor.
Step 2: Age is a clear risk factor - most cases occur in people in their 50s and 60s, though some subtypes appear in younger patients and even children. So option (a) is valid.
Step 3: Gender (and race) matter too - most skin lymphomas are more common in men than women, and more common in African-Americans than whites. So option (b) is valid.
Step 4: A weakened immune system is a strong risk factor. People with AIDS, HIV infection, or those on immunosuppression after organ transplant (heart, kidney, liver) have a higher risk. So option (c) is valid.
Step 5: Because age, gender, and immunosuppression are all genuine risk factors, the single best answer is (d) All.