Which of the following is equivalent to the polynomial expression below?
( 10g^3-8g^2+5g-14 ) + ( 10g^2+12g )
A: 10g^3 + 2g^2 + 17g-14

B: 10g^3 + 2g^2 + 17g - 14

C: 20g^3 + 2g^2 + 17g - 14

D: 20g^3 - 8g^2 + 17g-14