Which defect is out of scope for the given test charter?

You have been asked to execute an exploratory testing session on Park & Ride system. The test charter has been titled as “Buy a bus ticket”. As a result, a number of defects were reported, the titles of which are listed below.

Which defect is out of scope for the given test charter?
A . Price for a bus ticket was calculated incorrectly.
B. Failed to buy a bus ticket after 18:00.
C. Failed to buy a bus ticket when the network connection to the Central System is down.
D. Payment for parking ticket is restricted to cash only (no credit card supported).

Answer: D