2.
By the way, sprint regen time and speed depends on the map, 1 word: Balance.
Edit: Oh, and 1's a great one too. I spoke in the comments with Snowbat a while ago, apparently, there's not a lot of singleplayer gamemodes and maps because the game was primarily made for mobile phones, and, as they said, by far the only benefit of the PC port is high texture quality.