Answer:
a. divided into three phases.
Step-by-step explanation:
The paleolithic period is the period of pre-history and is divided into three phases based on the making and use of stone tools. Its period ranges from the earliest known human development to around eight thousand B.C. And therefore is also known as the old stone age. The three phases are known as:
a)lower paleolithic
b)middle paleolithic
c)upper paleolithic.