In an Effort to Improve Profits,a Major Canadian Car Rental

In an effort to improve profits,a major Canadian car rental company monitors all rentals for safety and customer satisfaction.For each rental the company must report the type of car,the age of the driver,whether the car was ready at the agreed upon time,and any mechanical problems.

A) Who: All car rentals; Cases: Each car rented is a separate case; What: Type of car,age of driver,whether the car was ready,and mechanical problems; When: Current; Where: Canada; Why: To improve profits; How: Data are collected from rental records.
B) Who: All car rentals; Cases: Each car rented is a separate case; What: Type of car,age of driver,whether the car was ready,and mechanical problems; When: Two years ago; Where: Not specified; Why: To improve customer service; How: Not specified.
C) Who: All car rentals; Cases: Each car rental company is a separate case; What: Type of car; When: Current; Where: Canada; Why: To improve profits; How: Data are collected from rental records.
D) Who: Car rentals; Cases: Each agency is a separate case; What: Type of car,age of driver,whether the car was ready,and mechanical problems; When: Last year; Where: Canada; Why: To improve customer service; How: Data are collected from rental records.
E) Who: Car rental company; Cases: Each car rented is a separate case; What: Type of car,age of driver,whether the car was ready,and mechanical problems; When: Current; Where: Major car rental company; Why: To improve profits; How: Data are collected from rental records.