begun demanding OR begun to demand

[dubaiIn2007]

Municipalities have begun "demanding that private developers pay an increased share of the costs of expanding" the current road networks, sewer systems, and other public services to accommodate new development projects.

d) to demand that private developers pay for an increased share of the costs to expand

ans: a

is there any rule here?

[sankp]

IMO,
In D, 'pay for' is wrong

'pay for' = To bear a cost or penalty in recompense: You'll pay for this mischief!

[gagan_ait]

I guess sankp, the question dubaiIn2007 is asking is why we have chosen "demanding" rather than "to demand". Any pointers guys?

[kaus]

I think the rules lies in

have begun demanding - More acceptable
have begun to demand -

Example:
Children from K.V.M. school have started coming to the park..... (better)
Children from K.V.M. school have started to come to the park.....

Any other thoughts ?