Which two tasks begin immediately after positions have been assigned?

The correct response highlights that clearing fields of fire and preparing fighting positions are critical tasks that need to be executed promptly after positions have been assigned. These actions are essential to ensure that the area is free from obstructions that could hinder visibility and engagement with the enemy. By clearing fields of fire, Marines can maintain effective lines of sight and accurate firing positions, which are crucial for combat effectiveness.

Simultaneously, preparing fighting positions involves fortifying the assigned locations, which may include digging in or creating cover to enhance protection and survivability against incoming fire. This preparation is vital to setting up a defensive posture that allows Marines to effectively engage the enemy while minimizing risk.

Other task options present important activities but do not carry the same immediate urgency following position assignment. For example, establishing communications, while essential, typically occurs alongside or after the initial establishment of fighting positions. Likewise, checking equipment and distributing gear are important logistical tasks but can occur slightly afterward as Marines settle into their designated roles. Conducting reconnaissance and setting up defenses, while also critical, are broader strategic tasks that would follow the initial essential actions of clearing and preparing positions.