When Building Medical Words,what Should You Do When Adding a Suffix

Multiple Choice

When building medical words,what should you do when adding a suffix that begins with a consonant to a combining form?

A) Keep the vowel in the combining form and add the suffix.
B) Keep the vowel in the combining form, add an o, then add the suffix.
C) Drop the vowel in the combining form, add an o, then add the suffix.
D) Drop the vowel in the combining form, drop the consonant in the suffix, and add the suffix.