The Audio Track Mixer is the most appropriate tool for this task. It provides a dedicated fader for each audio track in the sequence. By adjusting the fader for the track containing all the voice-over clips, you can non-destructively and conveniently control the overall volume level for every clip on that track simultaneously. This is the standard professional workflow for mixing entire audio tracks.

A. The Audio Clip Mixer adjusts the volume of individual clips as the playhead passes over them, not the entire track's level at once.

C. While selecting all clips and adjusting the rubber band works, it modifies the intrinsic volume of each clip. The Track Mixer is a more direct and flexible tool for overall track-level mixing.

D. This method applies a fixed gain value to the selected clips, which is a form of clip-based gain staging, not a dynamic mix adjustment for the entire track.

1. Adobe Premiere Pro User Guide

"Mixing audio with the Audio Track Mixer and Track Faders": "The Audio Track Mixer represents audio tracks in a sequence... To change the volume for a track

move its fader up or down in the Audio Track Mixer. The fader provides a quick way to change the volume of a track." This directly supports option B as the intended method for track-level volume adjustment.

2. Adobe Premiere Pro User Guide

"Mixing audio with the Audio Clip Mixer": "The Audio Clip Mixer in Premiere Pro lets you adjust the audio level and pan of clips... As the playhead moves over a clip in the Timeline

the clip’s controls become active in the Audio Clip Mixer." This confirms that the Clip Mixer (Option A) operates on a per-clip basis

not a per-track basis.

3. Adobe Premiere Pro User Guide

"Adjusting gain and volume": This section describes adjusting volume for clips using the volume "rubber band" and the Audio Gain command. It states

"You can adjust the volume for one or more clips." This clarifies that options C and D are clip-level adjustments

which are less convenient for managing an entire track's mix compared to the dedicated Audio Track Mixer.