What is the reason with the statement

Can someone check my answer? you : )

Fractions can be added and subtracted only if they're fractions. a. like b. proper c. improper d. unlike

5. which description does not guarantee that a quadrilateral is a squar ajo is a parallelogram with perpendicular diagonals 0% has all sides congruent and all angles congruent o has all right angles and has all sides congruent 10% is both a rectangle and a rhombus 30%