Which of the following best defines the two quantities that are measured to find the call rate of a phone company? a. the quantity of price measured in dollars depends on the quantity of time measured in minutes. b. the quantity of time measured in minutes depends on the quantity of price measured in dollars. c. the quantity of time measured in minutes depends on the quantity of speed measured in calls per minute. d. the quantity of speed measured in calls per minute depends on the quantity of time measured in minutes.