They allowed a small rural population to provide food for a large urban population
The statement that [after the peasants carry out their revolt, Martin Luther sympathizes with them and joins their cause] is false.
It was expected that Martin Luther would support the Peasant War, yet he did not because he was not a revolutionary person and truth be told, he did not like peasants.
Statements A. C. and D. are all actions that individuals/groups can take that affect government policies.
The ability to petition and assemble (mentioned in statements A and D) are two of the five freedoms guaranteed in the first amendment of the US Constitution. These actions, as long as they are peaceful, can help to bring awareness to issues that citizens find relevant.
Lobbying is another action citizens can take. This can include writing letters, asking for interviews, and developing deals. All of these actions can result in change of government policies.