Nhận biết (M1)

In a 1998 study by Smith et al., the researchers used microhistological fecal analysis to determine the ratio of three plant subtypes (graminoids, forbs, and browse) within the diets of North American ungulates. The researchers did not perform this analysis on all such ungulates, __________ they focused exclusively on pronghorns and wild horses in New Mexico.

Which choice completes the text with the most logical transition?

• A.

  regardless;

• B.

  in other words;

• C.

  for instance;

• D.

  however;