Hummingbirds Are Attracted to Red Flowers with Long Tubes

Multiple Choice

Hummingbirds are attracted to red flowers with long tubes.What might you predict would happen to flowers if hummingbirds become the predominant species on a remote island?

A) Flowers would become gradually more red.
B) Flowers would develop shorter tubes.
C) Hummingbirds would develop longer beaks.
D) Hummingbirds would become extinct.