If the following connective were used between the two main points of a persuasive speech, the speech would most likely be organized in order. "We’ve seen the costs to our economy of dependence on foreign oil; now let’s look at some solutions."

The speech would most likely be organized in problem-solution order.

Explanation:

As the name suggests, a problem-solution speech is one that first presents the problem and its causes, then introduces the speaker's believed solution(s) to correct it. Let's take a look at the sentence:

"We’ve seen the costs to our economy of dependence on foreign oil; now let’s look at some solutions."

It is probably being used to link the two parts of the speech. The speaker says he has already discussed the problem of dependence on foreign oil. From this point on, he will present the solutions to it. Therefore, it is safe to say that his speech was organized in a problem-solution order.

answer; (external conflict)