Blue whales may be returning to the oceans of Alaska and British Columbia. For much of the twentieth century, the species was endangered. By the 1930s, 99 percent of the blue whale's population had been killed. Whale hunting was banned in 1966. However, the species' comeback has been slow. Blue whales have rarely been seen in Alaskan waters. Some researchers believe that recent sightings prove the animals are re-establishing an old migration route. Other researchers remain unconvinced that the whales ever stopped traveling the waters. Blue whales once migrated in large numbers from Mexico and California to Alaska. Do It! The blue whale population is _________. Press enter to interact with the item, and press tab button or down arrow until reaching the Submit button once the item is selected A surrendering B enclosed C confused D multiplying

D multiplying