What makes a good argument for choosing LOOCV over 5-fold CV?

What makes a good argument for choosing LOOCV over 5-fold CV?

• A. Models fit on smaller subsets of the training data result in greater overestimates of the test error
• B. LOOCV tends to underestimate test error
• C. LOOCV has lower variance than 5-fold CV
• D. 5-fold CV always overestimates the test error

Answer: (A)