Final Answer:
To show appreciation, the broker may give Mr. Freno a bottle of his favorite wine (Option B).
Step-by-step explanation:
In the scenario described, Mr. Freno referred his sister to the real estate broker, resulting in a home purchase. Option B, giving Mr. Freno a bottle of his favorite wine, is a thoughtful gesture that combines appreciation with a personal touch. It acknowledges Mr. Freno's role in the successful referral and shows gratitude in a way that aligns with a personal interest.
While options like taking Mr. Freno and his wife out to dinner (Option A), sending Mrs. Freno a small gift (Option C), or expressing appreciation (Option D) are also forms of gratitude, Option B specifically ties the gesture to Mr. Freno's personal preferences, making it a more personalized and meaningful expression of thanks.
Option B is the answer.