Final answer:
Without specific details about the services Hailey is using for her vacation plans, it's not possible to accurately determine how far in advance she can confirm her options. A is the correct.
Step-by-step explanation:
To determine how far in advance Hailey can confirm each option for her vacation plans, we need to have more context regarding the policies of the services she is using.
For instance, if she's booking a hotel or a flight, these services often have their own set of rules about how early you can book.
Typically, the options provided suggest different time frames that are standard for various booking platforms. Without additional information, it's impossible to provide the mentioned correct option in the final answer. However, usually, vacation-related bookings such as flights, hotels, or tours can be made up to 12 months in advance, which is a common booking horizon for many services.