Which Aspect of the Presidential Claims of Power That Has

Which aspect of the presidential claims of power that has continued in the Obama administration has come under increased scrutiny?

A) The power to execute U.S.citizens using weaponized drones
B) The unwillingness to continue extraordinary rendition
C) The procedure that expects trial for U.S.citizens even when they are not on the U.S.soil
D) The end to capture and interrogation of suspected terrorists in secret prisons
E) The refusal to adopt waterboarding as one of the techniques of interrogation