The correct answer is C.

Explanation: The underlined sound in "sharp" is the "ar" sound, which is similar to the "ee" sound in "machine."

- C. machine has a vowel sound that is similar to the "ar" sound in "sharp."

Other options:
- A. church: This contains the "ch" sound, which is different from the vowel sound in "sharp."
- B. change: This contains a different vowel sound and the "ch" sound.
- D. start: This has a different vowel sound compared to "sharp."
- E. loss: This has a different vowel sound as well.

Thus, "machine" contains a sound similar to the vowel sound in "sharp."