C. A Union General.
He was a general and commander of the Union armies during the late years of the Civil War.
The answer is <span>It allows readers to approach a “forbidden door.” </span>
Push factors include war, famine, descrimination ect. in the native country of the migrant eg Irish people were pushed to emigrate to america and england during the Great Hunger (1845-1849)
pull factors include the promise of good job opportunities in america, hot climate, ect