13. 又\( \hat{\theta}_1 \) 和 \( \hat{\theta}_2 \)同樣為參數θ的點估計值(Point estimator)，下列何者符合估計值\( \hat{\theta}_2: \)具備一致性(Consistency)的敘述？
(A) \( \text{E}[\hat{\theta}_2] = \theta \)
(B) \( \text{Var}(\hat{\theta}_1) < \text{Var}(\hat{\theta}_2) \)
(C)\( \lim_{n \to \infty} \text{Var}(\hat{\theta}_2) = 0 \)
(D)\( \text{E}[\hat{\theta}_2] = 0 \)

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