question 14 how is the channelized t-1 rate of 1.544 mbps determined? a. 64 frames/second * ((24 ds0s/frame * 8 bits/ds0) * 1 fb) b. 8000 frames/second * ((24 bits/frame) 1 fb) c. 8000 frames/second * ((24 ds0s/frame * 8 bits/ds0) 1 fb) d. 64 frames/second * ((193 bits/frame * 8 bits/ds0) 1 fb)