Answer: The correct answer is A. Initiative.
Explanation: An individual who has initiative likes to take charge of things.
He is voluntarily motivated to perform certain tasks because he considers it pertinent.
Taking initiative means having a willingness to get things done and it is a characteristic of pro-active people.
Individuals who demonstrate initiative tend to be responsible, conscientious and successful in their work-life.
In this particular case, Cassandra noticed a problem and she inmediatly dealt with it in order to solve it.
So, the correct answer is A. The quality that Cassandra demonstrated was Initiative.