George is constructing the circumscribed circle for â–³RST. He has already used his compass to complete the part of the construction shown in the figure.
Which construction could be his next step?
Construct the line through points A and T and a second line through points B and S.
Construct the line through points A and C and a second line through points B and D.
Construct the line through points A and B and a second line through points C and D.
Construct the line through points A and D and a second line through points B and C.
