A frame has a pin support at C and a roller at E. A couple (M=25.0) kN-m acts on member ABC. Define your coordinate axes clearly and solve for the reactions at the two supports. a) There is no vertical reaction at C and a horizontal reaction of 25.0 kN at E. b) There is a vertical reaction of 25.0 kN at C and no horizontal reaction at E. c) There is a vertical reaction of 12.5 kN at C and a horizontal reaction of 12.5 kN at E. d) There is a vertical reaction of 12.5 kN at C and no horizontal reaction at E.