问题如下：
An investor is considering hiring three managers who have the following skill levels:
Type I and Type II errors both occur when the investor is:
选项：
A. hiring Manager 1 for large-cap stocks and not hiring Manager 3 for small-cap stocks.
B. hiring Manager 3 for large-cap stocks and not hiring Manager 2 for small-cap stocks.
C. hiring Manager 3 for large-cap stocks and not hiring Manager 1 for small-cap stocks.
解释：
B is correct.
Hiring unskilled Manager 3 for large-cap stocks is an error of commission or Type I error, whereas not hiring skilled Manager 2 for small-cap stocks is an error of omission or Type II error.
