Which of the Following, Relative to Syphilis, Is Incorrect

Which of the following, relative to syphilis, is incorrect?

A) Lesions of primary syphilis resolve spontaneously without therapeutic intervention.
B) Lesions of secondary syphilis resolve spontaneously without therapeutic intervention.
C) The incidence of syphilis is dropping dramatically.
D) Penicillin is the drug of choice for the treatment of syphilis.
E) Gummas may be seen in or around the mouth.