Question

Patrick is constructing the circumscribed circle for △RST.

Answer 1

To me, the answer would be the option A :
 Construct the perpendicular bisector of ST¯¯¯¯¯ .

Hope this helps !

Photon

Answer 2

You need to construct the two perpendicular bisectors (Any 2 of the 3 will do)
So the answer is :Construct the perpendicular bisector of ST