Answer:
<h2>Particular achievements.</h2>
Explanation:
Classical or classic in those context refers to brilliant and unique eras, like top quality. So, basically, you can define classical as something special, or in this case special historic eras, because during those periods something was outstanding.
B. Walter Rauschenbusch
Rauschenbusch was a theologian who wrote Christianity and the Social Crisis in 1907, so that is the correct. Upton Sinclair was a muckraker, who wrote "the Jungle". Jane Addams was a suffragette and Ida Tarbell was another muckraker. So, A, C and D are not correct.
