The word which has a suffix that means “fit for” is the following one:
B. Seaworthy.
Explanation:
If a ship is seaworthy, it is fit for a sea voyage, that is, it is in condition to cross the seas. Therefore, the suffix -worthy means "fit for", as in "trustworthy" (fit for trust), "creditworthy" (fit for credit), and "praiseworthy" (fit for praise).
