Final answer:
In Illinois, it is legal for Sandy to place her license with a referral company, provided she does not perform any licensed real estate activities.
Step-by-step explanation:
The question pertains to real estate licensing laws in Illinois and whether Sandy can place her license with a referral company while working as a personal assistant for an agent. The correct answer to whether this practice is legal in Illinois is a) Yes, as long as she doesn't perform any licensed activities. Referral companies are legal in Illinois, and real estate agents can place their license with a referral company to avoid paying Multiple Listing Service (MLS) dues and fees, provided that they do not engage in activities that require a real estate license.