All the events in the sample space that are not part of the specified event are called A. simple events. B. joint events. C. the sample space. D. the complement of the event.

D.Complement of the event.

Explanation:

All event that are not the part of the event are known as complement of the event. In simple terms all those outcome that we do not want  are complements.  The event and its complement make all possible outcomes.  

If our event A is “The sun will rise ,” then the complement, A', is the event “the sun will not rise.” If you're drawing a card from a standard 52-card deck, and the event A is “you draw a spade,” then the complement A' is “you don't draw a spade.