He was undecided. He let the grass grow under his feet. A. loitered around B. stayed out C. sat unmoving D. moved away

The correct answer is C. sat unmoving.

The phrase “let the grass grow under his feet” means to procrastinate or to waste time. This is because grass grows slowly, so if someone lets it grow under their feet, they are not taking any action to cut it. This can be a metaphor for someone who is not taking any action to achieve their goals or who is not making any progress in their life.

The other options are incorrect because they do not mean to procrastinate or to waste time.

• Option A, loitered around, means to hang around in a place without a particular purpose.
• Option B, stayed out, means to remain outside.
• Option D, moved away, means to go to a different place.