The point A of a triangle ABC moves parallel to the straight-line BC. Which one among the following also moves along a straight line parallel to BC?(a) The circumcenter (b) the centroid (c) the incentre (d) the orthocenter.

The point A of a triangle ABC moves parallel to the straight-line BC.

1.	The point A of a triangle ABC moves parallel to the straight-line BC. Which one among the following also moves along a straight line parallel to BC?(a) The circumcenter (b) the centroid (c) the incentre (d) the orthocenter.
A.	(d)
B.	(b)
C.	(c)
D.	(a)
Answer» C. (c)