Help ill mark brainliest and yea answeeer

2r + t + r
3r + t
The correct answer is C - None of the Above.
When we combine like terms, we combine terms that have the same variables but different coefficients. We cannot add 2r and t because r and t are not the same variables.
Hope this helps!
Answer:
None of the above
Step-by-step explanation:
Because the answer is 3r + t