It is estimated that at present scientists have _____________ of the baseline data they need to evaluate the status of ecosystems in the United States.
A)about 75%
B)almost all
C)less than half
D)100%
E)slightly more than half

Question

Quizplus · Accepted Answer

According to the sentence, scientists have only an estimated amount of baseline data, and it is less than half of what they need to evaluate the status of ecosystems in the United States. Therefore, the best choice is C, which says "less than half." The other options, such as almost all (B) or 100% (D), are not supported by the information in the sentence.

It Is Estimated That at Present Scientists Have _____________ of the Baseline