What are the leading coefficient, constant term and degree, if any, of the algebraic expression 7^x + 2x + 1?
 a.
 leading coefficient: 2; constant term: -1; degree: 2
 c.
 leading coefficient: 2; constant term: 1; degree: -2
 b.
 leading coefficient: -2; constant term: 1; degree: 2
 d.
 none, expression is not a polynomial
 Please select the best answer from the choices provided
 A
 B
 C
 D