People interested professionally in looking at public opinion describe the "distribution" of opinions about a particular question.
A public opinion is a way to measure the trends, wishes and desires of people about a specific issue or anything of the importance for the investigator. The term "public opinion" is an old one traced back to seventeenth century.
Closed-ended questions are those which can be answered by a simple "yes" or "no," while open-ended questions are those which require more thought and more than a simple one-word answer.
answer
i think its D. the nearby seas allowed Rome to trade with other places