Supply or provide?

[Rebecca]

Hi!
Please have a look at this sentence:
These rivers ...... water from farming.
A- provide B-supply
C-equip D-offer
Which is correct?
And can you tell me what is the difference between 'to provide something for somebody' and 'to supply something to somebody' ?
Sometimes I see people write 'to supply/provide somebody with something'. So is that correct?
Thanks in advance.

[Torsten]

I think if you change 'from' to 'for' you can use 'supply'.

TOEFL listening lectures: A university lecture by a Drama professor

[Skype2teach]

Provide would mean give it to someone, supply may refer to them getting it for by through another method

although you can use either, it doesnt make that much difference