Respuesta :
Answer:
B
Step-by-step explanation:
I believe it is the communtative property followed by the associative property.
Sorry if that is not right!
The property that could be used to rewrite the expression is the associative property used once
What are associative law?
This is a law that is relation two or more values or variables together using parenthesis without changing the result.
Given the integers A, B and C. According to the law:
(A+B) + C = A+(B +C)
Given the expression (1/3+2/7) + 3/4, this can be rewritten as  1/3 + (3/4 + 2/7) based on the law of associativity.
Hence the property that could be used to rewrite the expression is the associative property used once
Learn more on associative property here: https://brainly.com/question/13181