Coast to coast flights were known as transcontinental flights.
It commonly refers to a non-stop passenger flight between an airport in the West Coast of the United States and an airport in the East Coast of the United States.
In 1921 the final destinations were mainly in Florida.
The Clouster was a gigantic biplane which flew coast to coast on 24th February, 1921. It became the first place to fly with a load heavier than its weight. Later, it took passengers from san Diego to Los Angeles.
The correct option is C. They had trained and rehearsed for the mission. Originally, the black regiment had prepared for the offensive and was going to lead the charge against the Confederate Army, however one day before the battle they were ordered not to do that and were replaced by white troops. This result in a defeat of the Union Army.
Local rfoads, not interstate highways