During the twentieth century, which factors from this list have made the Middle East significant to the rest of the world?

1) Technological innovations

2) Production of nuclear power

3) Religious and ethnic conflict

4) Existence of vast oil reserves

Responses

1 and 2
1 and 2

3 and 4
3 and 4

1 and 3
1 and 3

2 and 4
2 and 4