Still don't understand what "C" means. Can someone explain, please?
In game, there is a ranked seasonal event called "Theater" which utilizes your dolls but expends no resources on your part. It's a rush of enemy groups to eliminate, twice per day. You obtain resources exclusive to theater for basic participation, and receive tangible assets depending on how many points you've achieved.
On top of the base gameplay there is sort of a lottery that you can put resources into, that will yield you more points than you invested the following day. Zone A gives a small bonus. Zone B gives a mid bonus. Zone C gives a big bonus. The lottery element is: You have to guess which of the three zones are going to be invested in the least for that day. The zone with the least investment gets an even bigger bonus than Zone C.
Now to answer the next question, "Why would you choose C then? Everybody should be encouraged to go for zone A so the veterans in the know can benefit the most from choosing C." It's because C will always yield a large bonus anyways, so there's not much reason to bank on the lower bonuses.