Which of the following accounts for Andrew Carnegie’s success().

A.His ability to sell the product and his policy of expanding business.

B.His reputation as the King of steel.

C.His founding of the steel industry in the United States.

D.His creation of a global distribution network.

实施产地检疫时，动物群体检查的内容包括（）。

A.了解疫情

B.静态检查

C.食态检查

D.动态检查