Final answer:
Prescott's interpretation aligns with the Abolitionist Movement (B), as it reflects the 19th-century debates over the extension of slavery into newly acquired territories like those from the Mexican Cession.
Step-by-step explanation:
Prescott's interpretation of the conquest of Mexico resonates most closely with the Abolitionist Movement, which is represented as option B. In the 19th century, the Abolitionist Movement sought to end slavery and was during a time when the expansion of the United States brought intense debate about whether new territories should be free or slave-holding. The Manifest Destiny philosophy not only pushed for physical expansion but also brought into focus the political and moral debates surrounding the spread of slavery. With Prescott's work commenting on the nature of conquest and control, it aligns with the contemporary issues of slavery and how territories like those acquired from Mexico would be integrated into the United States.