Final answer:
After a marketing promotion, Florida becomes the most popular holiday tour offered by the travel company.
Step-by-step explanation:
The most popular holiday tour offered by the travel company after a marketing promotion is Florida. Originally, the most popular tours in reverse order were Toronto, Florida, Rome, and Paris. Rome was always extremely popular, but after a promotional campaign, Toronto's popularity surpassed Rome's, but did not exceed that of Florida. Thus, considering the information provided, Florida now stands as the most popular destination offered by the company post-promotion.