Rectangle EFGH is shown below with line IJ passing through the center:

Rectangle EFGH is shown with a line IJ passing vertically through the center of the rectangle.

If rectangle EFGH is dilated by a scale factor of six about the center of the rectangle to create rectangle E'F'G'H', dilated line I'J' will

remain unchanged
be parallel to line IJ
shift six units up
be perpendicular to line IJ