Which of the Following Is an Example of Grassroots/outside Lobbying

Which of the following is an example of grassroots/outside lobbying?

A) an e-mail encouraging members to contact their senators and representatives in Congress
B) an organization asking members for donations to support the group's work
C) a meeting held with a legislator in the legislator's home district
D) a group submitting written testimony in a congressional hearing
E) a group forming a coalition with another group that has similar policy goals