A gerund is a verbal that ends in -ing and functions as a noun. The one that contains a gerund functioning as a direct object is D.
They did not ask others to join their cause just as Thoreau did.
They gave their followers a better model for disobedience than Thoreau.
They had less to lose than Thoreau and those who opposed slavery.
They recruited and encouraged others to disobey in an organized effort.
It's great, and very true. As a teenager that has depression and uses Social media. The whole depression part can come from cyberbullying, etc.
Age, Gender, Ethnicity, and probably Organizational affiliation.