Which of the following are continuous functions? (select all that apply.)
statement a: the temperature in new york city as a function of time.
statement b: the population of new york city as a function of time.
statement c: the temperature at a specific time as a function of the distance due west from new york city.
statement d: the altitude above sea level as a function of the distance due west from new york city.
statement e: the cost of a taxi ride as a function of the distance traveled.