The year 1917 was important for the Wright Brothers because
A) their first successful flight occurred.
B) their patent expired.
C) they began to work for the army.
D) they began to work for the British Air Force.
The year 1917 was important for the Wright Brothers because
A) their first successful flight occurred.
B) their patent expired.
C) they began to work for the army.
D) they began to work for the British Air Force.