The correct answer is C. It contains the opinion of a person who saw A Man's World. The writer gives his opinion that Rachel Crothers' play A Man's World "will not change conditions". This is the writers opinion and not a fact. It is also the opinion of person who went to see the play as he refers to the plays writer.
John Muir was an American-Scottish naturalist who loved storms. In his essay " A Windstorm in the Forest", he wrote that he delighted in his experience of climbing to the top of the trees and riding out the storm for hours. He would then close his eyes and listen to the music of the storm or indulge himself to the rich fragrance that was streaming past.
because there is a list at the end of the sentence we know there has to be a comma. so our only two options are either b or c. but when we look as c we notive there isnt a comma after nature meaning it isnt correct. so b is the best option