French and Indian war (also known as the seven years war), led tensions between the 13 colonies and Britian. This is because in this war france lost New France to the British. When taxes began to rise in the colonies and Americans were starting to rebel, French were happy to help since it would be a sort of revenge since losing their colony in North America.
Land masses formed barriers and only 1 path allowed trade
Because Portugal became one of the most important allies of Spain. The prime minister of Portugal knwon as Salazar was supporting the army of Franco. Many dissidents of Portugal were protected in Spain and, even though the relations were a little bit tense, Portugal gave their full support giving aircraft as an aid to Franco in Spain. Salazar<span> reassured Franco and his allies that no interference would hinder the supply traffic directed to the Nationals. </span>
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The answer to your question is D. Appalachian Mountains
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