Cheyenne is playing a board game. her score was -275 at the start of her turn, at the end of her turn her score was-425. what was the change in cheyenne's score from the start of her turn to the end of her turn ?

Pick the expression that matches this description: a polynomial of the 5th degree with a leading coefficient of 7 and a constant term of 6 (choice a) 7x^5+2x^2+6 (choice b) 7x^6−6x^4+5 (choice c) 6x^7−x^5+5 (choice d) 6x^5+x^4+7