Squamous cell carcinoma

Q) What is the correct regarding squamous cell carcinoma? (For oncosurgery skin MCQs see here)

A)Chronic healing wound is a risk factor.

B)Bowen's disease does not have a risk of malignant transformation.

C)In situ disease present as slightly pink or skin coloured raised plaques.

D)Imiquimod is not used as a treatment option.