To determine how many injuries occur each year in the United States due to traffic collisions, we need to assess the given data and identify the correct number from the choices provided.
The options available are:
a. 1 million
b. 3 million
c. 5 million
d. 9 million
Upon careful consideration, it is noted that the number of injuries reported each year due to traffic collisions is 3 million. This information matches the option b.
Therefore, the correct answer is:
b. 3 million
