The displacement of a particle executing simple harmonic motion is given by $y = A0 + Asin{\omega}{t}+ Bcos\omega{t}$. Then the amplitude of its oscillation is given by :

Question

( A ) $A+B$
( B ) $\sqrt{{A^2}+{B^2}}$
( C ) $\sqrt{A_\omicron^{2}{A^2}+{B^2}}$
( D ) $A_\omicron\sqrt{{A^2}+{B^2}}$