Please help will give brainlest if correct.

Read the passage from Roughing it. Chapter 5.

The passage describes a dog. It makes his head swim. He stops, and looks all aound: climbs the nearest sand-mound, and gazes into the distance shakes his head reflectively, and then without a word he turns and jogs along back to his train, and takes up a humble position under the hindmost wagon, and feels unspeakably mean and looks ashamed and hangs his tail at half-mast for a week.

What phrase from this passage suggests that the dog feels defeated?

O gazes into the distance

O makes his head swim

O hangs his tail at half-mast

O climbs the nearest sand-mound​