During the nineteenth century, the popularity of Charles Dickens's fiction owed much to its being...

its being so easily adaptable into effective stage versions; so that, during any given period, as many as 20 London theaters might be simultaneously in production of

it being so easy to adapt it for effective stage versions; during any given period, as many as 20 London theaters might have been producing simultaneous

the fact that it was so easy to adapt into effective stage versions; during any given period, as many as 20 London theaters might be simultaneously producing

the fact that it was so easily adaptable for effective stage versions; during any given period, as many as 20 London theaters simultaneously might be producing

the fact of its being so easy to adapt it Into effective stage versions; so during any given period, as many as 20 London theaters might simultaneously be in production of