which period is older than the triassic period?\ncambrian\ncretaceous\njurassic\npaleogene

which period is older than the triassic period?\ncambrian\ncretaceous\njurassic\npaleogene
Answer
Brief Explanations:
The Cambrian period predates the Triassic period. The Cretaceous, Jurassic, and Paleogene periods all came after the Triassic. The Cambrian is part of the Paleozoic era and is much older in the geological - time scale compared to the Triassic which is part of the Mesozoic era.
Answer:
A. Cambrian