Polonius Registered for Five Nights at Cloud Hotel at $200

Polonius registered for five nights at Cloud Hotel at $200 per night.Cloud requested Polonius' credit card number when he registered.When Polonius went to a restaurant,his credit card was denied,since it was at the authorized credit limit.Why was Polonius' credit card limit likely reached by registering at Cloud Hotel?

A) Cloud charged the card the full amount of his stay.
B) Cloud charged the card $1,200 with the 20% overage allowed to cover possible damages.
C) Cloud blocked Polonius' credit card when he registered.
D) Cloud made use of the card for payments other than paying the hotel tariff.