20 points plz help!! Read the excerpt from "The Night the Bed Fell."

The situation was finally put together like a gigantic jigsaw puzzle. Father caught a cold from prowling around in his bare feet but there were no other bad results. “I’m glad,” said mother, who always looked on the bright side of things, “that your grandfather wasn’t here.”

Which word best describes the tone of this excerpt?

mysterious

relieved

anxious

joyous

only answer if you know it!