1. a
2.b
3.a
4.d
5.b
6.a
7.c
8.c
9.a
10.a
11b.
12.c
13.b
14.d
15.a
16.d
17.d
18.c
19.b
20.a
Robert E. Kahn and <span>Vint Cerf invented Internet.</span>
Answer: the helots, formed major labour force for farming.
Explanation:
An end to world wars, and the league of nations
Answer:
Europeans at Ellis Island
Explanation:
