Russ is constructing the inscribed circle for △abc . he has already used his compass and straightedge to complete the part of the construction shown in the figure.
what could be his next step?

a)use the straightedge to draw a line through point n that intersects bc .
b) use the straightedge to draw the line through points m and p.
c) place the point of the compass on point c and draw an arc that intersects ac and bc .
d)place the point of the compass on point n and draw an arc that intersects ab and bc .