Respuesta :

D- cheaper

Because When you add Er to cheap You don’t have to take anything out or add anything

Answer:

D. Cheap

Explanation:

Here's what happens when you at -er:

Silly -> Sillier (changed)

Holy -> Holier  (changed)

Funny -> Funnier (changed)

Cheap -> Cheaper (not changed)

The only one that did not need to be changed before adding -er was cheap.

Hope this helps :)