Park and fly.For most people, parking the car is a mundane activity devoid of planning. However, Heathrow airport has so many car parks and parking options that if you park in the wrong place the charges could exceed the cost of the flight. Terminal 5s car park can hold 2,200 cars, and the long-stay car park can hold 3,800 cars and 150 motorcycles, so finding a space should never be a problem, but the turn-up prices can be much higher than those offered for pre-booking. The multi-storey car parks at Heathrow airport are mainly for short-stay parking where there is a general vehicle height restriction of 2 metres. Charges are designed to discourage a stay of more than six hours, and the daily rate is punitive. Vehicles up to 2.4 metres in height can park on the ground floor of car park 3 (serving Terminals 1, 2 and 3).Customers using Terminal 4 can park vehicles up to 2.6 metres in height on the roof of car park 4 or alternatively they can use business parking, where they will be charged the short-stay tariff for stays of up to six hours, after which time long-stay tariffs apply. Terminal 5 customers can also use business parking combined with a short courtesy coach transfer. Vehicles up to 2.6 metres in height can use the Terminal 4 forecourt for the purposes of dropping off and picking up only. Vehicles taller than 2.6 metres need to park in the long-stay car parks (one-day minimum stay) or at business parking. The former charges a variable daily rate depending on the number of days stayed, whilst the latter charges a fixed amount per day for stays between 1 and 13 days and a fixed sum for stays between 14 and 28 days. Stays longer than 28 days incur the fixed sum plus the fixed amount per day charge for the additional days.

Question: Parking a vehicle at business parking costs twice as much for 26 days as it does for 13 days.
Options:
A. true, B. false, C. uncertain
Answer: "C"