How can the active condition (HIGH or LOW) or the decoder output be determined from the logic symbol?

A triangle indicates active-HIGH

A triangle indicates active-LOW

How can the active condition (HIGH or LOW) or the decoder output be d

1.	How can the active condition (HIGH or LOW) or the decoder output be determined from the logic symbol?
A.	A bubble indicates active-HIGH
B.	A bubble indicates active-LOW
C.	A triangle indicates active-HIGH
D.	A triangle indicates active-LOW
Answer» C. A triangle indicates active-HIGH