In a real$-$time dynamic wireless network, the system employs a multi$-$agent DQN$-$based power allocation algorithm. During a high$-$mobility scenario, where the maximum Doppler frequency $($f$\_$d$)$ is significantly high, the agents experience degraded performance. Which of the following strategies is most effective for maintaining performance in this scenario?

$(2$ Points$)$

Note: Choose the best possible option from given options

Reduce the discount factor $($$)$ to prioritize immediate rewards over future ones.

Use centralized power allocation methods like WMMSE to compensate for the rapid channel variations.

Increase the number of hidden layers in the DQN to better capture environmental complexity.

$$Increase the learning rate $($$)$ of the DQN to speed up adaptation to the new environment