Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information.

• Many Roman soldiers remained in Britain after conquering it, and their presence had a strong influence.
• The new Roman province of Britain seemed to awaken in the first century A.D. as the local economy improved.
• Camps, fortifications, and economic change contributed to the Roman conquest of Britain.
• With the conquest of Britain by Roman troops, the Roman Empire gained considerable economic strength.

This is a multiple choice.