1. While browsing through Flight & Hotel service, if I selected Business class, will the hotels’ results be affected?
Yes, they will. The hotels’ options will be automatically  ordered from highest to lowest price.
 

2. Can I book a one way flight with a hotel in “flight & hotel” service? 
No, you can’t. “Flight & Hotel” service is designed to be taken as a roundtrip flight and one hotel. However, in “design your package” service, you can do that by adding the flights and hotels desired then shutting down the unwanted sector.
 

3. What is the difference between transportation, Hotels as single services and Flight & Hotel service? 
Flight & Hotel service is designed only for one destination including one hotel and round trip ticket. While through hotel service you can book as many hotels as you need in the same destination or in multiple destinations, and through transportation you can book up to 8 flights in the same booking.