The number of school buses needed to transport students on a field trip is given by the function
f(x) = where x represents the number of students going on the trip. What is the domain of this
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function?
A. 'x is the set of all real numbers.
B. x is the set of all integers.
c. x is the set of all nonnegative integers.
D. x is the set of all nonnegative real numbers.