What does the word hysterically mean in the following sentence?
the audience laughed hysterically at the comedian's jokes.
without real emotion
in a way that cannot be controlled
full of energy
in a pleasant way

The reversalists continue their labors, confident that they will one day construct an engine that generates more compression than it uses, a perpetual power source that will restore to the universe its lost vigor. which theme is best supported by the excerpt? a. scientific study requires dedication and perseverance. b. people will always look for a way to achieve immortality. c. death must always be endured alone. d. change is difficult to accept but beneficial if embraced.