什么情况下，适合刀切，什么情况下适合拔靴。

问题如下：

Compared with bootstrap resampling, jackknife resampling

选项：

A.is done with replacement B.usually requires that the number of repetitions is equal to the sample size C.produces dissimilar results for every run because resamples are randomly drawn

解释：

For a sample of size n, jackknife resampling usually requires n repetitions. In contrast, with bootstrap resampling, we are left to determine how many repetitions are appropriate