The summer demand for hotel accommodation in London comes mainly from foreign tourists. Demand for hotel rooms in London in summer could be reduced by a fall in the price or value of which of the following? 1 US dollars 2 Aeroplane tickets 3 Sterling A. a. Item 1 only B. a. Items 1 and 2 only C. a. Items 2 and 3 only D. a. Item 3 only