The correct answer is A. elation.
Euphoria is a state of intense happiness and excitement. It is often caused by positive events, such as winning the lottery, getting married, or having a child. Euphoria can also be caused by drugs or alcohol.
Indignation is a feeling of anger or displeasure caused by something considered unjust or unfair. It is often accompanied by a desire to take action to correct the situation.
Depression is a mental illness that causes a persistent feeling of sadness and loss of interest in activities once enjoyed. It can also cause changes in sleep, appetite, energy levels, concentration, and self-worth.
Disorder is a state of confusion or chaos. It can be caused by a variety of factors, such as natural disasters, war, or civil unrest.
In the context of the question, the workers were in a state of euphoria because they had just heard some good news. They were happy and excited about the future.