What was the most significant result of the penninsular war

The Peninsular War immeasurably raised Britain's military prestige and contributed heavily to Napoleon's downfall. The guerrilla warfare carried out by irregular Spanish forces added a new term to the military vocabulary and served as a model for future insurgencies.

the navigation act prevented the colonies from exporting to countries other than britain and it prevented the importation of goods by other countries as well. so i believe the correct answer is d. other nations could not deliver goods to the colonies.

hope this .