As a teenager, I . . . . . . . . that I . . . . . . . . just young and attractive.

Solution(By Examveda Team)

The correct option is Option A: felt.
In the context of the sentence, the use of the past tense "felt" is appropriate. It indicates that during the person's teenage years, they experienced a particular feeling or emotion. The sentence structure suggests a past action or state.

The other options are not correct:

Option B: was is not the correct choice as it doesn't properly complete the sentence.
Option C: had felt uses the past perfect tense, which is not necessary in this context.
Option D: am is in the present tense, which is not suitable for describing past actions during teenage years.
Option E: have been is in the present perfect tense, which is also not suitable for the past timeframe mentioned in the sentence.