A line segment is dilated by a factor of 4 and the center of the dilation is a point on the line segment. Which of the following is the result of this dilation?

a. A line segment that is 4 times longer and in the some position as the original line segment
b. a line segment that is 4 times longer and perpendicular to the original line segment, crossing the original line segment at the center of the dilation point
c. a congruent line segment that is parallel to the original line segment
d. a line segment that is 4 times longer and parallel to the original line segment