An Object Sits at the Focal Point of a Parabolic

An object sits at the focal point of a parabolic mirror. At what distance from the mirror will its image be created?

A) It will be imaged at half the focal length.
B) It will be imaged at the focal length.
C) It will be imaged at twice the focal length.
D) No image will be created (the beams would be reflected parallel to each other) .
E) The image is created on the other side of the mirror.