The year gap of the population of 4 billion people was from 1974 - 1986. Exactly 12 years of 4 billion people.
Your reading above gets my article completely backwards. The research shows that women who work outside the home have LOWER rates of depression than those who do not, even when we control for other factors, like pre-existing health problems that might make some women less likely to work. Someone needs a better fact checker or copy-editor!
The correct answer was A) he felt this would allow the population to thin itself out naturally
The answer is going to be true