From the Above Figure, Which Other Event Occurred Closest in Time

From the above figure, which other event occurred closest in time to the divergence of gorillas from the lineage that led to humans and chimps?

A) the divergence of chimps and humans
B) the divergence of Dryopithecus and Ouranopithecus
C) the divergence of gibbons and siamangs
D) could be either the divergence of chimps and humans OR of Dryopithecus and Ouranopithecus
E) could be either the divergence of chimps and humans OR of gibbons and siamangs