How must the graph y=3x2+1 be transformed to obtain the graph of y=3x2−1?


A Each point on the graph of y=3x2+1 must be translated 2 units left.


B Each point on the graph of y=3x2+1 must be translated 2 units up.


C Each point on the graph of y=3x2+1 must be translated 2 units down.


D Each point on the graph of y=3x2+1 must be translated 2 units right.