Answer:
The strategies that survive iterated elimination of strictly dominated strategies are:
1. (TL) - top-left strategy
2. O (M, L) - mixed strategy of playing M with probability 1/2 and L with probability 1/2
3. O (B, R) - mixed strategy of playing B with probability 1/2 and R with probability 1/2
4. O (MC) - mixed strategy of playing M with probability 1/3 and C with probability 2/3