I believe the answer is d-after the hypothesis has been confirmed through extensive testing.
Acceleration
this part is so i have enough characters for it to accept
<span>The situation is one similar to the development of antibiotic resistance. The initial five years of spraying wiped out most of the pests; however, the killing also helped the pesticide-resistant pests to survive and thrive since they had less competition. Over the period of five years, the pesticide resistance became more and more common among the beetles and in the eighth year, almost all of the beetles were resistant to the pesticide. Thus, the answer is D.</span>
around 55 percent of the world's population is thought to be living in an urban area or city, with that figure set to rise to 68 percent over the coming decades, according to the UN.
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