David performed the following mathematical operation:

x-1 3x+4/3x²+x-4

He was left with a remainder of zero. Which of the following statements must be true?

A.-1 must be a root of the polynomial 3x²+-4
B. 0 must be a root of the polynomial 3x²+x-4
C.-3\4 must be a root of the polynomial 3x²+x-4
D.1 must be a root of the polynomial 3x²+x-4