How many states in the United States have an active volcano?
12
5
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
6
7
3
4
5
1
2
6
7
3
4
5
1
2
6
7
3
4
5
1
2
6
7
3
4
5
1
2
6
7
3
4
5
1
2
6
7
3
4
5
8
1
2
6
7
3
4
5
8
1
2
6
7
3
4
5
9
8
1
2
6
7
3
4
10
11
5
9
8
1
2
6
7
3
4
10
11
5
9
13
8
1
2
6
7
3
4
10
11
9
12
13
8
1
2
6
7
10
11
9
12
13
8
6
7
10
11
9
12
13
8
6
7
10
11
9
12
13
8
6
7
10
11
9
12
13
8
6
7
10
11
9
12
13
8
6
7
10
11
14
9
12
13
8
6
7
10
11
14
9
12
2 states
4 states
7 states