The mode that does not remove trailing spaces when CHAR values are retrieved is . . . . . . . .

This question is about how MySQL handles spaces in CHAR data types. CHAR is used to store fixed-length strings.

The question asks which mode doesn't remove trailing spaces when you retrieve data from a CHAR column.

Let's break down the options:
* Option A: PAD_CHAR_TO_FULL_LENGTH: This mode doesn't remove trailing spaces. It ensures the CHAR value is always filled to its full length by adding spaces if needed.
* Option B: TO_FULL_LENGTH_CHAR_PAD: This mode also doesn't remove trailing spaces. It works the same way as PAD_CHAR_TO_FULL_LENGTH.
* Option C: CHAR_PAD_TO_FULL_LENGTH: This mode is not a valid mode in MySQL.
* Option D: PAD_CHAR_TO_LENGTH: This mode is also not a valid mode in MySQL.

So the answer is either Option A or Option B. Both options correctly describe the mode that doesn't remove trailing spaces.

Remember: In MySQL, trailing spaces are usually removed by default when working with CHAR data. The modes in the question help you control this behavior.