Red pen in hand ,the math teacher very carefully graded the tests

What is the adverb intensifier in the sentence
A. Very
B.Red
C. Carefully
D.math

A. Very

The adverb intensifier in the sentence is "very."

The adverb intensifier in the sentence is "very."

To identify the adverb intensifier, we need to look for a word that modifies the verb "graded" and emphasizes or intensifies its action. In this case, "very" is an adverb that intensifies the carefulness of how the math teacher graded the tests. It adds a higher degree of emphasis to the action.

Option A, "Very," is correct. Options B, C, and D do not intensify the verb "graded" but provide additional information about the pen, the teacher, and the subject being graded.