Oral cancer is a malignant tumor presented by a nonhealing sore in the mouth or lip that causes difficulty chewing or swallowing. Which of the following statements applies to an oral cancer diagnosis?

It involves unexplained lymph node swelling in the head and neck area.

It is three times more likely in women than men.

It involves unexplained lymph node swelling in the axillary area.

It is usually painless and resolves without treatment.