asked 227k views
4 votes
I really need this answer right away. Im taking an exam.

How long has the polygraph machine been in use?
A.Over 2000 years
B. Over 1000 years
C.Over 200 years
D. Over 100 years

1 Answer

1 vote

Answer: 100 years

Explanation:

answered
User Vince Lowe
by
7.3k points
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