Nhận biết (M1)

A student is writing a research paper on the history of irrigation in the southwestern United States, concentrating on the Clear Lake Reservoir, created in Modoc County, California, in 1910. The student claims that the Clear Lake Reservoir is one instance in a long line of successful attempts at irrigation in southwestern states, such as California, Arizona, and New Mexico.

Which quotation from a historian best supports the student’s claim?

• A.

  “Sprinkler irrigation systems, which were developed in the late 20th century, are a method of irrigating that requires machinery that can spray water in all directions. These systems are currently widely used in many areas of California, New Mexico, and Arizona.”

• B.

  “Several major irrigation canals currently in use in central Arizona follow the original paths of the irrigation system constructed by the Hohokam people in the early 7th century CE, the first of a number of systems in the region.”

• C.

  “The significance of the Clear Lake Reservoir in the development of California cannot be overstated, since irrigation is a principal means of transporting water for food production.”

• D.

  “Farmers in New Mexico and Arizona began adopting modern drip irrigation techniques in the 1970s, significantly reducing water waste compared to the flood irrigation methods that had been introduced to the region in the early 20th century.”