In which case does the root word need to change when adding a consonant suffix.
A. if the word ends in y, preceded by a consonant (silly+ness)
B. if the word starts with the same letter that the suffix starts with (life + less)
C. if the word ends in an e, preceded by a consonant (safe + ly)
D. if the word ends in an n, and the suffix starts with an m ( entertain + ment)