The correct answer is C.

Explanation: The underlined sound in "bird" is the "ir" sound, which is pronounced as /ɜːr/ in British English or /ɝː/ in American English.

- C. nurse contains the same /ɜːr/ sound as in "bird."

Other options:
- A. bed: Contains the /ɛ/ sound, which is different from the /ɜːr/ sound.
- B. bad: Contains the /æ/ sound, which is different from the /ɜːr/ sound.
- D. love: Contains the /ʌ/ sound, which is different from the /ɜːr/ sound.
- E. talk: Contains the /ɔː/ sound, which is different from the /ɜːr/ sound.

Thus, "nurse" is the option that contains the sound similar to the one in "bird."