Select the appropriate adverb for the highlighted word in the sentence.
I complete forgot her birthday, and I don’t know how to make it up to her.

Correct option is B

The correct substitution of the highlighted word is (b) completely.
Explanation:
The adverb "completely" is needed here to modify the verb "forgot." "Complete" is an adjective, but we require an adverb to describe the action of forgetting. Hence, "completely" is the correct form.
Grammatical rule used:
When modifying a verb, an adverb form should be used, not an adjective.
Example:
· Incorrect: He complete forgot the keys.
· Correct: He completely forgot the keys.
�� Information Booster:
Adverbs often end with '-ly' and describe how, when, where, or to what extent an action is performed.