A theme is the purpose of a text
The best example of an adverb phrase is B. Mr. Bruns had been teaching for 35 years.
This is an adverb phrase, because the phrase "for 35 years" answers the question of how long Mr. Bruns had been teaching. The verb is "teaching", and "for 35 years" modifies this verb.
It helps you and develops your skills.
The second sentence of the 1st paragraph for sure and the third and fourth sentences yuo can both pick their both right but your only to provide two so. I hope this helps be sure to mark me the brainliest.