When did students move into Xavier's main building?

The correct choice indicating that students moved into Xavier's main building in 1956 is based on historical records of the institution's development. This year marked a significant milestone for Xavier, as it was when the new facility was completed and ready for occupancy. The transition to this main building symbolized an era of growth and expansion for the campus, providing students with enhanced facilities and resources.

By placing the effort and investment into the construction of a new central building, the institution aimed to foster a more vibrant academic environment, which in turn facilitated an improved educational experience for its students. The year 1956 is commonly referenced in documentation regarding Xavier's history, underscoring its importance in the school's timeline.

While the other years listed might be significant in their own contexts, they do not correspond to the timeframe when students officially moved into the main building, thus making 1956 the correct and most relevant answer.