Ordering X-Values by Second Derivative

Consider the particular solution $$y=\sqrt{4x^2+25}$$ to the differential equation $$\frac{dy}{dx}=\frac{4x}{y}$$. The second derivative is $$\frac{d^2y}{dx^2}=\frac{100}{(\sqrt{4x^2+25})^3}$$. The approximate values of the second derivative for selected values of $$x$$ are as follows:

• At $$x = -3$$, $$\frac{d^2y}{dx^2} \approx 0.210$$
• At $$x = -1$$, $$\frac{d^2y}{dx^2} \approx 0.642$$
• At $$x = 1$$, $$\frac{d^2y}{dx^2} \approx 0.642$$
• At $$x = 3$$, $$\frac{d^2y}{dx^2} \approx 0.210$$

Based on this information, which of the following correctly orders the given $$x$$-values from least to greatest according to their corresponding second derivative values? If two second derivative values are equal, the smaller $$x$$-value should be listed first.