In an equilateral triangle, three coins of radii 1 unit each are kept so that they touch each other and also sides of the triangle. The area of triangle ABC in square units is

A

$$4+2\sqrt3$$

B

$$6+4\sqrt3$$

C

$$12+\frac{7\sqrt3}{4}$$

D

$$3+\frac{7\sqrt3}{4}$$