A certain population of bacteria doubles every 60 minutes. Beginning with 50 bacteria in the culture, the population can be represented by the function A=50(2)t, where A is the number of bacteria after t number of hours. Which of these is the appropriate domain for the function A in terms of given context? A. all real numbers greater than or equal to 0 B. all integers greater than or equal to 50 C. all integers greater than or equal to 0 D. all real numbers greater than 50