What was the format of the Tenka Sanbun no Kei tours held by BJW, DDT, and K-Dojo from 2007 to 2015?

A. Three separate shows, one for each promotion, on different days
B. A single show featuring all three promotions at the same time
C. A tournament featuring wrestlers from all three promotions competing against each other
D. Three shows in one day, with each promotion holding a morning, afternoon, and night show at the same venue
Answer: 