The best answer is: <span>D. therefore, consequently
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</span>The word "therefore" suggests a connection between a cause and an effect. For example: It rains, therefore I am wet.
Similarly "consequently" marks an effect, which means that it can be a signal for cause and effect clause. For example: I didn't study. Consequently, I failed.
The First Barbary War (1801–1805), also known as the Tripolitan War or the Barbary Coast War, was the first of the two wars fought between the United States and the Northwest African Berber Muslim states, known collectively as the Barbary States.