What is the bit rate of a video terminal unit with 80 $$\frac{character}{line}$$, 8 $$\frac{bits}{charcter}$$ and horizontal sweep time of 100 us (inciuding 20 us of retrace time)?

A

8Mbps

B

6.4Mbps

C

0.8 Mbps

D

0.64 Mbps