Although at one time children’s programming had been limited to a few hours a week, now, however, there are at least four cable networks that dedicate themselves entirely to shows produced specifically for children.
A.	Although at one time children’s programming had been limited to a few hours a week, now, however, there are at least four cable networks that dedicate themselves
B.	With children’s programming having been limited at one time to a few hours a week, now at least four cable networks have dedicated themselves
C.	Once limited to a few hours a week, there are now at least four cable networks with children’s programming that dedicate themselves
D.	Children’s programming was once limited to a few hours a week, but now there are at least four cable networks dedicated
E.	While children’s programming had once been limited to a few hours a week, at least four cable networks are now dedicated
							