Which of the following best describes how aircraft changed during the course of world war i?
a) aircraft became heavier and were used for bombing the enemy.
b) aircraft became faster and were used to carry heavier loads.
c) aircraft became slower and were used for reconnaissance.
d) aircraft became slower and were used for bombing the enemy.

The correct answer is B) Aircraft became faster and were used to carry heavy loads.

The option that best describes how aircraft changed during the course of World War I is “Aircraft became faster and were used to carriy heavy loads.

During World War I, aviation developed new technologies and evolved with the construction of modern aircraft that allow the countries to have better aviation to strike the enemy, to recognize areas, carry heavy loads, better mobility and gain control of the air space.  

step-by-step explanation:

100%     = 120

1%= 120/100=   1.2

9%   = 1.2 x 9=     10.8

10.80 to the 120 to get $130.80