HH Is an Outdoor Theatre Which Is Based in the Capital

HH is an outdoor theatre which is based in the capital city of country N. Tickets for shows can be booked at the ticket office or online. HH has identified the following critical success factors (CSFs) : An excellent, online ticket booking system Customer satisfaction Which of the following would be suitable key performance indicators (KPIs) for HH? (Choose all that apply.)

A) Customer show ratings, scored out of ten.
B) Number of returning customers each year.
C) Profit from sales of snacks and drinks.
D) Employee turnover.
E) Percentage of ticket bookings aborted before completion.
F) Number of customer complaints.