Explanation
Correct answer: B.
Choice B is the best answer. The convention being tested is the use of verbs to express tense in a sentence. In this choice, the present perfect tense verb “has collected,” used in conjunction with the phrase “since 1945,” correctly indicates that the Food and Agriculture Organization has collected this type of information in the past and continues to do so in the present.
Why the other choices are wrong
Choice A
Choice A is incorrect because the present progressive tense verb “is collecting” is inconsistent with the phrase “since 1945,” which indicates that the action occurred in the past and continues into the present.
Choice C
Choice C is incorrect because the future tense verb “will collect” is inconsistent with the phrase “since 1945,” which indicates that the action occurred in the past and continues into the present.
Choice D
Choice D is incorrect because the present tense verb “collects” is inconsistent with the phrase “since 1945,” which indicates that the action occurred in the past and continues into the present.