Final answer:
Typically, services like eyebrow threading and gel manicures can be double booked, whereas haircuts, blowouts, and massages require the full attention of a professional and are less likely to be double booked.
Options C (Eyebrow threading) and D (Gel manicure) would be more likely candidates
Step-by-step explanation:
In the context of business operations, particularly those related to beauty and wellness centers, the question of which services can be double booked at a blue level is likely referring to a specific scheduling or service tier system within an establishment. Services that are typically less time-sensitive or require less immediate hands-on attention from a single professional may be eligible for double booking. Of the options listed:
As services can vary greatly from one establishment to another, it's important to check with the specific business's policies. However, typically, options C (Eyebrow threading) and D (Gel manicure) would be more likely candidates for double booking due to the nature of the services which may include periods where direct interaction with a service provider is not required.