Topic: Degree of Comparison,

Best Answer Explained in Below-:

The correct answer to the phrase "He is taller than---" is actually A) me, not C) I. The reason is tied to grammatical structure and the rules of comparative forms in English.

When you use a comparative adjective, such as "taller," the standard practice is to follow it with an object pronoun when making direct comparisons. In this case, "me" is the appropriate choice because it functions as the object of the comparison. The phrase should read "He is taller than I am," but in casual spoken English, many people drop the verb "am," leading to the shortened version, "He is taller than me."

The other options are incorrect for the following reasons:
- B) "myself" is a reflexive pronoun and should not be used in this context.
- C) "I" is a subject pronoun, which would be inappropriate here as it does not fit the object position.
- D) "am I" also does not fit grammatically because it changes the sentence into a question, which is not the intention of the comparison.

So, the correct grammatical choice to fit "He is taller than---" is "me."