B hope this answer fits you well
Answer: D) Companies replaced hand-operated brakes with air brakes on trains.
B. Immigrants left Ellis Island within hours; they often remained in Angel Island for weeks.
Immigrants in Angel Island came from Asian countries, specifically, China, Japan, Russia, and South Asia. Upon arriving in Angel Island, they have to undergo medical examination and interrogation process.
The length of time an immigrant spend on Angel Island varies on the length of his or her interrogation process. Some immigrants produce false paperwork, which lengthened their interrogation process because the authenticity of said paperwork must be verified before they can be granted entry to the United States.
It was "C. Israel and Egypt" that <span> signed the Camp David Accords in 1978, since this famous treaty was brokered by the United States in order to help bring peace to the Middle East. </span>
