The force acting on a body moving along x-axis varies with the position of the particle as shown in the figure. The body is in stable equilibrium at:

• A. \[x={{x}_{1}}\]
• B. \[x={{x}_{2}}\]
• C. both \[{{x}_{1}}\]and \[{{x}_{2}}\]
• D. neither \[{{x}_{\text{1}}}\]nor \[{{x}_{2}}\]