Nhận biết (M1)

Contrary to the popular image of scientific breakthroughs as sudden flashes of solitary genius, the history of most major discoveries is one of _________ progress: incremental refinements, frequent dead ends, and the gradual accumulation of evidence over many years.

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

• A.

  meteoric

• B.

  painstaking

• C.

  illusory

• D.

  effortless