4. (05.01 MC) Theorem: A line parallel to one side of a triangle divides the other two proportionately. In the figure below, segment DE is parallel to segment BC and segment EF is parallel to AB: The figure shows triangle ABC with segments DE and EF. Point D is on side AB, point E is on side AC and point F is on side BC. Which statement can be proved true using the given theorem? (6 points) Segment BD = 12 Segment BD = 4 Segment BF = 16 Segment BF = 9