According to this tree, what percent of the species seem to be extant (in other words, not extinct)?

According to this tree, what percent of the species seem to be extant (in other words, not extinct)?

According to this tree, what percent of the species seem to be extant (in other words, not extinct)?




A) 25%
B) 33%
C) 50%
D) 66%
E) 75%


Answer: D