If a politician tells you that "everybody is joining his team", then this is called a Bandwagon Propaganda. Bandwagon is a persuasive technique of propaganda, wherein others are encouraged to do the same act as what others do because the majority of the people agreed in joining them. An example of a Bandwagon technique is, "Most of the people are voting for this candidate. We should vote for him too."
Answer:
In my opinion, it could be D.
C is wrong just by using common sense, B and A doesn't make much sense either. But D seems reasonable.
By protesting , signing petitions, and informing people on the rights and wrongs.
Technically it is true that Frederick Scott Archer introduced the concept of combining artificial and natural light in the studio, but it should be noted that this concept had been used before, just without much fame.
