Blue Whales and Humpback Whales Were Both Greatly Overharvested Before

Blue whales and humpback whales were both greatly overharvested before commercial whaling was banned in 1986.Humpbacks are making a comeback, but blue whale populations remain very low.The most likely reason for this is that blue whales

A) have lower reproductive rates.
B) have higher reproductive rates.
C) are smaller than humpback whales.
D) suffer from more severe habitat loss.
E) are keystone species in marine communities.