Can someone help me, if you get it right ill give you brainiest

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

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%

What is the common difference for this arithmetic sequence? -6,-2,2,6,10 a.4 b.5 c.3 d.6