The answer is A. Asparagus spears should be eaten with the fingers.
Per formal etiquette, bread should never be cut with a knife, it should be served to the whole table already broken into servings for each individual.
Trying to slice the corn on the cob at the table is completely implausible. The only way to eat corn on the cob is with your hands.
Eating anything directly from a servers tray is bad form.
