In general, a frosh entrant with applicable transfer credit is not obligated to spend four years (but can choose to if desired).
However, business at UCB can be a special case, since the minimum appears to be three years for most frosh entrants, since students need to apply to the major after enrolling as an undeclared student (transfer entrants have direct admission).
For the other UC business majors at UCI and UCR, investigate how this works.
Transfer admission difficulty can be checked at https://www.universityofcalifornia.edu/infocenter/transfers-major .