One of the main reasons why governments need ambassadors to foreign Countries is because the ambassadors have an intimate relationship with many high ranking officials in said country--making it easier for the two countries in question to enact trade deals and other mutually beneficial measures.
I guess the answer of your question is C, it helps you
The answer is D. Over 150,000 Allied troops were used in the invasion of Normandy.
The U.S. had a victory over British and Indian forces in Ontario, Canada, enabling the United States to consolidate its control over the Northwest.