Final answer:
Visitors like vacation packages for greater economy, ability to budget, greater convenience, and implicit assurance of consistent quality. However, vacation packages do not support mass tourism.
Step-by-step explanation:
The reason why visitors like vacation packages that is not listed in the given options is that vacation packages support mass tourism. While greater economy, ability to budget, greater convenience, and implicit assurance of consistent quality are all reasons why visitors like vacation packages, the support of mass tourism is not. Mass tourism refers to the large-scale movement of tourists to specific tourist destinations, which can have negative impacts on the local economy, environment, and culture.