C

Step 1: Analyze the motion of each block.
Each block is moving to the right with a certain speed, while the ground block (A) is moving to the left with a speed of 5 m/s. The direction of motion of the blocks with respect to each other dictates the direction of the friction forces.

Step 2: Determine the direction of friction forces on each block:
- **Block E:** Moving right at 2 m/s relative to the ground. The friction on E will act to the left (opposing the relative motion).
- **Block D:** Moving right at 1 m/s relative to the ground. The friction on D will also act to the left (opposing the relative motion).
- **Block C:** Moving right at 3 m/s relative to the ground. The friction on C acts to the left (due to higher speed of Block A).
- **Block B:** Moving right at 5 m/s relative to the ground and the friction will act to the left (opposing the relative motion).
- **Block A:** Moving left at 5 m/s. The ground (A) experiences friction from all the blocks above it, hence the friction force acts to the right on A.

Step 3: Summary of friction directions:
- Friction on E: Left
- Friction on D: Left
- Friction on C: Left
- Friction on B: Left
- Friction on A (ground): Right

Therefore, the correct answer is the direction indicated in option C.