From Liz and Nellie what definition best matches the meaning of trial in paragraph 20 My plans have changed again. Instead of Paris and on to

the fast ship, it is on to England to catch whatever ship I can. I
don't know if I can recover from this delay. There can be no
more missed connections, and Nellie Bly must have a similar
trial if I am to win.

The definition of trial in this context would likely be "a challenging or difficult experience."