During World War I, airplanes were most often used for:
O
A. transporting goods.
B. launching chemical weapons.
O
C. observing enemy positions.
D. clearing barbed wire.

B

Explanation:

Throughout World War 1, airplanes were most often used for "Bombing targets on land" since this was seen as one of the most effective ways to hurt the enemy.

the group i'm selecting: greeks.

a first group of greek immigrants came to the us in the 1850s. the second group came to america starting in the 1890s due to economic opportunities they didn't have back in their home caused by the hardships of ottoman rule. greek immigration was 90% male, many of them expected to work and return to greece after earning enough capital, but ultimately had to remain in the us after the greek genocide.