If A:B=2:3A:B = 2:3A:B=2:3 and B:C=4:5B:C = 4:5B:C=4:5, what is the combined ratio A:B:CA:B:CA:B:C?
2:3:52:3:52:3:5
8:12:158:12:158:12:15
6:9:156:9:156:9:15
2:4:52:4:52:4:5