Answer:
Common denominators
A variable in the numerator
A variable in the denominator
Explanation:
Note: An an algebraic fraction is the fraction that has some algebraic expression in numerator and some algebraic expression in denominator.
So, if fractions would have common denominators, a variable in the numerator or a variable in the denominator would be an algebraic fraction.
Therefore, following options best describes an algebraic fraction:
common denominators
a variable in the numerator
a variable in the denominator