Qing Is Writing a Cover Letter to a Prospective Employer

Qing is writing a cover letter to a prospective employer, Chris Ryan, a sales manager at Durable Gasket Company. Qing took the name from the job posting, so he is unsure of Chris's gender. Even a search of the company website proved unhelpful. How should Qing address Chris in his letter?

A) Dear Durable Gasket Company
B) To Whom It May Concern
C) Dear Sir/Madame
D) Dear Chris Ryan
E) Dear Chris