Read the text and determine if the sentence is true:

Some of us had frightful dreams , and all of us carried chips on our shoulders at breakfast .<br>Felicity and Dan began a bickering which they kept up the entire day .<br>Felicity had a natural aptitude for what we called `` bossing , '' and in her mother 's absence she deemed that she had a right to rule supreme .

Sentence: Dan was unhappy in the morning.
It's impossible to say