How many bands are credited with the start of grunge music?
4
2
1
2
4
1
2
4
1
2
4
1
2
3
4
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
3
4
0
7
5
1
2
3
4
7
5
1
2
0
3
6
4
7
5
1
2
3
6
10
0
4
7
5
1
2
3
6
10
4
0
7
5
1
9
2
3
6
10
4
7
5
1
9
2
0
3
6
10
4
7
5
1
9
3
6
10
4
7
5
9
3
6
10
11
7
5
8
9
3
6
10
11
7
5
8
9
3
6
10
11
7
5
8
9
6
10
11
7
5
8
9
6
10
11
7
8
9
6
10
11
13
7
8
9
6
10
11
13
7
8
9
6
10
11
13
7
8
9
6
10
11
13
7
8
9
6
10
11
13
7
8
9
6
10
11
13
2 bands
4 bands
89