Respuesta :
Answer:
A
Step-by-step explanation:
Rational expressions, as described by the question, is a fraction that has a polynomial in its numerator and its denominator.
An example will be:
[tex]\displaystyle \frac{x^2-2x+1}{x-1}[/tex]
The numerator is a trinomial, and the denominator is a binomial.
Variable expressions is another way of saying polynomials.
As far as I'm concerned, rational fractions and variable fractions don't have any meaning.