D. Because i did that and I remember it was d. So hope it helps
<span> Scientists keep track of the change of population numbers to make decisions about issues that affect certain populations.</span>
The conditional sentence in this would be D
Answer: The speaker envisions a time when everyone will receive equal amounts of work and leisure.
Explanation: For the responder, Countee Cullen’s “From the Dark Tower” excerpted text describes the statement closely to “the speaker envisions a time when everyone will receive equal amounts of work and leisure”. Since the author speaks figuratively of inequality between amount of workload and leisure, he sought for an upbringing, a revolutionary vision that everyone should receive an equal distribution concerning income and not all the work should be done by the less fortunate people but all should have their own fair share of undertakings to face.