this the answer of your question
Its A cuz u said "the politician greeted his supporters, adverb really means a phrase, expressing a relation place, time &circumstance.
It's B because Who fits in the sentence: <u>Who</u> made this beautiful sculpture because your asking which person made this.
Hope this helps! :)
Answer:
Christina is going to give a persuasive speech.
Explanation:
In her speech Christina will explain the reasons why this new method will be helpful to collect research data, she will not only give her reasons but also she will try to convince the audience on the benefits of this methods, that is why Christina will give a persuasive speech.