Add the phrase that completes the thought in the underline sentence.

Read the section "trump wants a change in terms."which sentence from the section shows why there are discussions about the future of nafta? a)he has said that he wants to change the terms of the agreement and has even threatened to pull the u. s. out of nafta. b)in response, negotiators from all three countries have been meeting to discuss possible changes to the agreement. c)the sixth round of talks was held in montreal, canada, on january 29.d)nafta has allowed goods to travel freely across north america.

Why does lewis thomas express concern about what we would say to beings from another planet

Pls, i really need on this question?