Let ABC be an isosceles triangle. Suppose that the sides AB and AC are equal and let the length of AB be x cm. Let b denote the angle ∠ABC and sin b = 3/5. If the area of the triangle ABC is M square cm, then which of the following is true about M?

A

$$M < \frac{x^2}{4}$$

B

$$\frac{3x^2}{4} \leq M < x^2$$

C

$$M \geq x^2$$

D

$$\frac{x^2}{2} \leq M < \frac{3x^2}{4}$$

E

$$\frac{x^2}{4} \leq M < \frac{x^2}{2}$$