Respuesta :

Answer:

The Curtiss-JN Biplane, known as the Jenny, was the most famous American airplane of World War I. Although it never got into combat, the two-seater was used primarily for training purposes.

Explanation:

Answer:

B.  

They were used to observe enemy troops from the air.

D.  

They were armed with weapons and used for battle.

Explanation:

Because reconnaissance planes fly and had guns