Answer: A. She wanted to bring all the comforts normally found on the sleeping car of a train.
A pullman was a term used to refer to the sleeping cars of trains. This was because they were operated by the Pullman Company from 1867 to 1968. Sometimes, it was used to describe railway dining cars as well. In this excerpt, the implication is that Mercedes wanted to pack all the comforts that a sleeping car of a train would have.