Which of the Following Statements About Squamous Cell Carcinoma of the Larynx

Which of the following statements about squamous cell carcinoma of the larynx is true?

A) Primary tumors more commonly arise from the supraglottic laryngeal structures than from the glottic region.
B) At the time of diagnosis, 50% of tumors have extended beyond the laryngeal structures.
C) Supraglottic tumors are more likely to present with palpable lymphadenopathy than glottic lesions.
D) Subglottic tumors tend to present with early lesions that are easily managed with primary surgical resection.