Ammar is constructing an angle congruent to ∠mnp . with his straightedge, he draws and labels de−→− . he places the compass point on point n and draws an arc that intersects nm−→− and np−→− . he labels the point where the arc intersects nm−→− as point q and the point where the arc intersects np−→− as point r. without changing the compass opening, he puts the compass point on point d and draws a long arc that intersects de−→−. he labels the point of intersection as point f. what is ammar's next step? a. without changing the compass opening, put the compass point on point f and draw an arc. b. open the compass so that the compass point is on point q and the pencil point is on point r. then put the compass point on point d and draw an arc. c. open the compass so that the compass point is on point q and the pencil point is on point r. then put the compass point on point f and draw an arc. d. without changing the compass opening, put the compass point on point d and draw an arc.