Its A ( summarize the experimentation process scientist used)
Explanation:
I took the test
Answer:
B. helping both parties find common ground.
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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.