The emotional state of Eliza that can be inferred is that she is sad.
This can be inferred based on the statement that states <u>a tear traveled down her cheek</u>. She is sad because something terrible happened of which she never thought would happen. She named this occurring as a nightmare.
So, the correct answer is the emotional state of Eliza is that she is sad.
Examples, one with a comma and one without: Shakespeare was born in Stratford and went on to write Hamlet. Shakespeare was born in Stratford, later writing Hamlet