A50-year-old hispanic man presents with an oval skin growth on his forehead. he noticed the growth 2 weeks ago, and it has gradually grew in size and is now bleeding spontaneously. he has been a farmer for the past 30 years and often works in the fields. he gives a history of cocaine abuse in his 20s. he is a diabetic and hypertensive on treatment with metformin and atenolol, respectively. on exam, there is an erythematous papule about 3x3 cm in size, which bleeds on probing. his bmi is 30. biopsy of the lesion reveals squamous cell carcinoma (scc) of the skin.
what is a risk factor for scc in this man?
(a) cocaine abuse
(b) his ethnicity
(c) his gender
(d) obesity