The best and most correct answer among the choices provided by your question is the first choice or letter A. The conclusion that could be drawn from the paragraph is that "<span>in a greenhouse, the Sun's heat is trapped by the glass."
Because of this greenhouse effect, global warming takes place. It is an abnormal rise of temperature which results to the melting of our polar ice caps.
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An effective argument includes both, because you have to present your opinion on the topic and then utilize facts to explain your reasoning.
The right answer for the question that is being asked and shown above is that: "d. among." <span>The secretarial tasks are divided among several people. That is the correct word that is to be used.</span>