During the impeachment trial of President Andrew Johnson, what government entity tries the case?

Secretary of War Edwin Stanton

Explanation: Johnson dismissed Stanton mainly because of the former's opposition in his Reconstruction policies. And although Stanton argued his protection due to the Tenure of Office Act which prevents a president from removing appointed officials without the approval of Congress, Johnson ignored it.  

c. it required that townships set aside land for public schools.

i think the answer is a and i hope this ; ))