Sequence Patterns Appear When

Multiple Choice

Sequence patterns appear when: 

A)  ​two or more database elements occur together in a significant pattern in which one of the elements precedes the other. 
B)  ​two or more database elements tend to occur together in a significant way. 
C)  ​three or more database elements occur together in a significant way. 
D)  ​three or more database elements occur together in an insignificant pattern in which two of the elements precede the other.