The following text is for questions 43 to 46. The walrus inhabits as a large Arctic marine mammal with flippers, a broad head, short muzzle, small eyes, tusks, and whiskers. Scientists recognize two subspecies of walrus - the Atlantic walrus and the Pacific walrus. Walruses are cinnamon brown in color. They are able to turn their hind flippers forward to aid in movement on land. Their front flippers are large and each has five digits. Males have special air sacs that are used to make a bell-like sound. Both males and females have large tusks that are used for defense, cutting through ice and getting out of the water. The tusks can be more than three feet long in males and about two and a half feet long in females. Walrus staples include clams, mussels and other bottom dwelling (or benthic) organisms that they locate through their whiskers. They are also known to eat carcasses of young seals when food is scarce. The worldwide walrus population is about 250,000 animals. Pacific walruses number more than 200,000. The Pacific walrus population was severely reduced by hunting in the past, but their numbers have rebounded after these severe reductions. The walrus is circumpolar in its range but they are found in geographically separate areas. The Pacific walrus is found in the Bering, Chukchi, and Laptev Sea, while the Atlantic walrus inhabits the coastal regions of northeastern Canada and Greenland43. Why was walrus population reduced in great number? Because..
A. hunters reduce walrus population B. walrus skin is a target of hunting C. walrus meat was served in some restaurants
D. walrus became home pet

44. If walrus does not have large tusk,
A. She can not get food in the ocean
B. She can not swim in deep ocean
C. She can not survive to live in south or north pole
D. She can live a long time

45. "A young seals will be killed by walrus when it is scarce food"
The sentence above means...
A. Walrus often eat young seal
B. Young seal is the walrus food
C. They eat young seal
D. They will eat young seal if the food is scarce

46. How many walrus can we find now?
A. 200,000
B. 250,000
C. 300,000
D. 350,000​