What is an official prerequisite for a crime?means that actus reus and mens rea need to be present simultaneously at the time of the crime for it to be deemed a crime.

Concurrence is a concept that means that actus reus and mens rea need to be present simultaneously at the time of the crime for it to be deemed a crime.

Concurrence of actus reus (commiting the illegal act) and mens rea (intent to commit the act, doing it on purpose) is generally necessary to constitute a crime. 

Vanessa had a dream to be a ballerina. with her father's she had that opportunity.

Ithink the answer is d.