\textbf{189.} Referring to the displacement–time graph of two oscillators A and B, where the mass of object A is four times the mass of object B, how many times greater is the force exerted on object A compared to the force exerted on object B?
\textit{[Figure: displacement–time graph showing two sinusoidal waves; wave A has amplitude 8 cm and wave B has amplitude 2 cm, with different periods]}
\begin{align*}
&(1)\quad 64\\
&(2)\quad \dfrac{1}{4}\\
&(3)\quad 16\\
&(4)\quad 4
\end{align*}