Which of the Following Statements Most Accurately Describes the Difference

Which of the following statements most accurately describes the difference between down time and response time?

A) Response time is the period of time when an information system is not operational and available for use whereas down time is the amount of time between a user action and the response from the information system.
B) Response time is the moment information is gleaned from the computer whereas down time is the period when the system is off.
C) Response time is the amount of time between a user action and the response from the information system whereas downtime refers to the period of time when an information system is not operational and available for use.
D) Response time occurs when the software is downloaded whereas down time refers to the period of time it takes for the software to activate.