The new policy has（）a large amount of investment for industry and business in this city.

A. infecting viruses, bacteria, and tumors with a drug
B. infecting proteins with a virus
C. infecting white blood cells with a virus
D. infecting viruses with proteins

A. extends only 1,200 feet below the earth’s surface
B. is about seven miles in width
C. is as much as twenty-five miles in thickness
D. is a zone only about one hundred feet wide