I believe it is A because it explains that their sons intruded their streets.
The correct answer is: B. for exchange to occur, each seller must have a product that some buyer wants.
The coincidence-of-wants problem refers to a potential problem individuals might face when conducting a barter trade. In a barter trade system, one individual buys something from another individual by giving him or her another thing in return. An example of a barter trade between farmers would be trading five sheep for five goats. However, when conducting a barter trade, both sellers involved must have a product that some buyer wants. This refers to 'coincidence of wants'.
<span>The best level of speech usage when it comes to giving a speech on the topic of disarmament in a regional speech contest would be formal. Formal speech is used when making a presentation that does not include visual aids. Formal speech is used to inform and persuade the listener to tops that would require action or further interest from the community due to a great concern.</span>
Answer:
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