Question

during the period 1820–1860, the major concerns in the united states dealt with issues related to
determining the future of slavery
imposing immigration quotas
developing big business
acquiring an overseas empire

Explanation:

Between 1820-1860, tensions over slavery's expansion into new U.S. territories, moral debates over the institution, and sectional divides between free and slave states dominated national discourse, culminating in the Civil War. The other options were not major concerns in this period: immigration quotas emerged later, big business growth accelerated post-1860, and overseas empire acquisition peaked in the late 1800s.

Answer:

A. determining the future of slavery