Order these from how much time it lasted, from least to greatest

1766 b. c - 1122 b. c

221 b. c - 207 b. c

618 a. d - 907 a. d

960 a. d - 1279 a. d

1368 a. d - 1644 a. d

Your answers to this question involve doing the math as to how many years each period lasted.  So the order goes as follows:

The dating system used is the traditional one based on the approximate year of the birth of Jesus Christ, which is how the Western world (influenced by Christianity) typically has dated its calendars.  "BC" stands for "Before Christ," and the years count from his approximate birth year backwards.  "AD" stands for "Anno Domini" - Latin for "In the Year of our Lord."  The years count forward from the time of Christ's birth.

your answer will be b. improving roads, bridges, and other infrastructure. hope i !

what are the options ?