A Movie Stunt Woman Takes a Running Jump from the Roof

Multiple Choice

A movie stunt woman takes a running jump from the roof of one building to that of a lower building.She leaves the taller building traveling perfectly horizontally at 6.1 m/s and just makes it to the edge of the roof of the lower building.The horizontal gap between the buildings is 2.8 m.The difference in height between the two buildings is

A) 1.0 m.
B) 1.4 m.
C) 2.3 m.
D) 2.8 m.
E) 3.0 m.