Which of the following statements is most correct in defining demand for a product?

c) 2,000 units per day at £1 each in the UK

Demand should refer to the volume that people are prepared to buy at a specified price within a specified area.

C is the answer. Demand is defined as the desire and willingness of the consumer to buy a product. From the definition which customer UK customers, How much they need (desire) to buy -2000 units per day and at what cost they will buy £1. It more clear than the other choices. 

I am little confused now , will you please explain me in detail ? why answer C ( only ) is True ? 

Which of the following statements is most correct in defining demand for a product?

c)2,000 units per day at £1 each in the UK

c) 2,000 units per day at £1 each in the UK

Agree with experts <<<<<<<<<<<<<<

Agreed with the Experts ............... 

Option C) is correct because it clearly states the number of units ordererd per day, and this is the way we can calculate/define demand for a product on the accrual basis not on the Assumptions....

whereas the other options does not provide suitable data to clearly define demand as on the actual basis...