State which type of graph (Pareto chart, time series graph, or pie graph) would most appropriately represent the data.
a. Situations that distract automobile drivers
b. Number of persons in an automobile used for getting to and from work each day
c. Amount of money spent for textbooks and supplies for one semester
d. Number of people killed by tornados in the United States each year for the last 10 years
e. The number of pets (dogs, cats, birds, fish, etc.) in the United States this year
f. The average amount of money that a person spent for his or her significant other for Christmas for the last 6 years