A) Spend 10-15 mins practicing a weakness.
Here is a few ideas - Muscle ups, handstand push ups, pistols, double unders, pull ups, ring dips, T2B.
B) On the minute for 12 mins perform :
3 Power Snatch 60/40kg
7 over the box jumps 24/20"
For every missed round perform 5 burpee pull ups.
C) 3 rounds for time
10 sit ups
10 hollow rocks