Please answer the following question by reasoning step-by-step.
Which is the most likely cause of throat tumors?\nOptions:\n- (A) cigars\n- (B) Allergies\n- (C) viruses\n- (D) Pesticides\n- (E) rocks\n- (F) doctors\n- (G) the skin\n- (H) water

(C)
Some viruses can cause cancer.

Lung cancer is a formation of tumors in the lung.

Some viruses result in the formation of malignant tumors.

.

The final answer: (C)