1. Which happened first? a. Settlers rushed to California to find gold.
b. The Pony Express was started.
c. The train line to California was finished.
d. The first telegraph line to California was finished.

a. Settlers rushed to California to find gold.

Explanation:

The movement of settlers to California to find gold is known as California Gold Rush, which started in 1848, and ended in 1855. The gold was found by James W. Marshall at California that allowed the migration of settlers to California.

The California Gold Rush is known as  America's largest mass migration in which around 300,000 people move to California.

Hence, the correct option is a. Settlers rushed to California to find gold.

for e2020. the answer would be some directions from the mountain range so we can find mt. whitney. to locate which direction is north, you should use a   compass. this would not only find mt. whitney, but also becuase of this long paragraph you would get points because it's not like anyone actually reads your work becuase once they read the first sentence it sounds dumb enough to not read becuase i'm not good at answering this but the answer is compass for your benefit.

for e2020 ; -;