4. to form the comparative degree of adverbs, you should add which of the following words? a. all or none b. more or less c. great or little d. most or least

To form the comparative degree of adverbs, you should add the words: B. More or less. Some examples in using these words are the following: more beautifully and less advertently, as these words apply. To compare means to identify the objects with higher or lower quality.

The third answer is correct.