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**Question:**

Select all correct statements below regarding the specific heats.

- A. \( c_p \) and \( c_v \) are constant values
- B. \( dh = c_p \, dT \) and \( du = c_v \, dT \) are true for ideal gases
- C. \( c_p = c_v + R \) is true for all gases
- D. \( c_p \) and \( c_v \) are functions of temperature only for ideal gases

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