Which interval gives an average change of $0$ for the function $y-3cos(4x+)-3?$

a$.,\frac{}{3}x\frac{}{2}$

c$.\frac{}{2}x\frac{3}{2}$

b$.,\frac{}{4}x<mfrac\; id="EditorElement\_1239678"><mrow\; id="EditorElement\_1239671"><mi\; id="EditorElement\_1239668"></mi></mrow><mrow\; id="EditorElement\_1239677"><mn\; id="EditorElement\_1239674">2</mn></mrow></mfrac>$

d$.,\frac{}{3}x\frac{}{2}$