How many great lakes form the Great Lakes Basin?
5
5
5
5
5
5
5
5
5
5
5
5
5
5
4
5
4
5
4
5
4
5
4
5
4
5
4
5
4
4
4
4
4
4
4
2
4
2
6
4
2
6
4
2
3
6
4
2
3
6
4
2
3
6
4
2
3
6
2
3
6
2
3
6
2
3
6
five
2
3
6
five
2
7
3
6
five
2
7
3
6
five
2
7
3
6
five
1
2
7
3
6
five
1
2
8
7
14
3
6
five
1
2
8
7
14
3
6
five
1
2
8
7
14
3
6
five
1
2
8
9
7
14
3
6
five
1
2
8
9
7
14
3
6
five
1
8
four
9
7
11
14
3
6
five
1
8
four
9
7
11
14
3
five
1
8
four
9
7
11
10
14
3
five
12
1
8
four
9
7
11
10
14
five
12
1
8
four
9
7
11
10
14
five
12
1
8
four
9
7
11
10
14
five
12
1
8
four
9
7
11