Which of these represent time averaging?

• A. \(\frac{1}{V}\int_V \phi dV\)
• B. \(lim_{V→∞}\frac{⁡1}{V}\int_V \phi dV\)
• C. \(\frac{1}{T}\int_t^{t+T}\phi dt\)
• D. \(lim_{T→∞}⁡\frac{1}{T}\int_t^{t+T}\phi dt\)