The image shows 2 circles. The circle with center B is a dilation of the circle with center A using scale factor 2. Select all true

a
The circumference of the circle centered at B is greater than the circumference of the circle centered at A by a factor of 2.

b
The ratio \small \frac{L}{R} is greater than the ratio \small \frac{l}{r} by a factor of 2.

c
The value of \small \beta is greater than the value of \small \alpha by a factor of 2.

d
The angle marked \small \alpha measures \small \frac{4\pi}{6} radians.

e
The angle marked \small \beta measures \small \frac{12}{8\pi} radians.