Question

Historians divide a particular duration of time with a distinct start and end

Answer 1

Answer:

C.Period

Explanation:

a decade=10 years

a century=100 years

a period=is a duration of time of an event from start to end

Answer 2

Answer:

A. a period

Explanation:

Periods are points in time and they are seperated like eras.

I hope my answer helps you :)