My daughter wants to fly BKK to MSP using NWA, CO and Korean air. She will be in B class. Would there be any problem in getting NWA miles with this combination? And how does it work with checking your baggage? Do you have to pick it up at any point or can it be checked right through to the destination? Just to verify, all classes of ticket will qualify for NWA miles/status on a trip on KLM?