Nhận biết (M1)

Domesticated thousands of years ago by Indigenous people in South America, the potato deviates structurally from the wild plant it is descended from. Summer squash, another crop domesticated by Indigenous Americans, shows so little resemblance to any wild plant that genetic research was necessary to __________ the wild Johnny gourd as its ancestor.

Which choice completes the text with the most logical and precise word or phrase?

• A.

  substantiate

• B.

  amass

• C.

  nurture

• D.

  magnetize