A wildlife expert predicts that the reintroduction of the caribou into northern Minnesota
would fail if the density of the timber wolf population in that region is more numerous than one wolf for every 39 square miles.
A) would fail if the density of the timber wolf population in that region is more numerous than
B )would fail provided the density of the timber wolf population in that region is more than
C )should fail if the timber wolf density in that region was greater than
D )will fail if the density of the timber wolf population in that region is greater than
E) will fail if the timber wolf density in that region were more numerous than
There are two approachs to solve this question:
a) According to some experts, the difference between WILL and WOULD is related to the certainty of
the information expressed in the sentence. In other words, how sure is the author about that topic.
In this sentence, the expert is sure that the reintroduction of the caribou WILL fail if the timber population is greater. If he were not so sure, we would have to use WOULD.
b) According to other experts, using WILL or WOULD depends on the tense of the sentence. If the tense is present we use WILL when we refer to the future. If the tense of the sentence is past, we use WOULD when we refer to the past. It's like reported speech.
What do you think about these two approachs? IMO, the second one is the correct IN THIS SENTENCE. Because the author is reporting something that the expert said, predicted.
What do you think?