单选题

A Because the airport in Paris was not fit for the scheduled landing.

B Because it was found to have run short of gasoline.

C Because it wanted to pick up passengers from another flight.

D Because there was a sudden mechanical problem.

解析：
录音中女士指出他们确实从伦敦乘坐飞机出发，同时提到“…but we flew via Brussels where we hung around for two hours waiting for passengers on another obscure charter flight…”，由此可知女士所乘坐飞机在Brussels中途停留的原因是为了搭载另一航班上的乘客。