Absolutely. They actually require a minimum of 3 choices. That could be 3 weeks or 3 resorts or any combo. The more choices you give yourself the better your chances. But there are many times when you don't want to put that many choices. Maybe you're trying to get a room and already have one booked at the same resort. Sometimes II will accept less than 3 choices, but their rules say 3. When we talk about II, we usually talk about being flexible. That usually means a number of weeks and resorts and generally at times other than peak times.