UCSB v. UCI v. UCSD

Hi I recently got admitted into the 3 schools stated in the title. I have been having the toughest time deciding where to attend based on academic opportunity. I was admitted into the schools for the following:
UCI: Undeclared
UCSB: (Pre) Economics and Accounting
UCSD: Economics
My dream was to get into UCI for Business Administration but unfortunately I did not. The only reason I would attend UCI is for the potential to switch into its Business Administration program. However, I heard that is not an easy feat (rumored 3.8+ freshman/sophomore GPA to be competitive).
I am fascinated by the Management Science major and business minor that UCSD offers and was wondering if anyone had experience with these two courses.
Ultimately I would love to build a career in finance but I am willing to do accounting as well. Which school do you think would offer the best opportunity?

The connections and internships you could get through UCSD’s Rady School of Management could be a huge plus, and its Econ department is considered one of the top 15 in the nation

Another vote for UCSD for the reasons stated above.