36.
Your Answer is
Correct Answer is H
Explanation
H item is correct, date back to traces back to.
Item F: In the forth century BC, the time modification is not clear, it may be a modification of the verb discovered, or it may be a modification of neighborhood.
G item: of means belonging, can not pick up the time.
Item J: The mistake is in the preposition on, and in should be used in several centuries.