The bit-field values are prefixed with . . . . . . . .

This question asks about how bit-field values are represented in MySQL.

Bit-fields are used to store data in a more compact way by using only the necessary bits for each value.

The correct answer is Option A: 0b.

In MySQL, bit-field values are prefixed with 0b to indicate that they are binary numbers. This is a standard notation used in programming languages to represent binary values.

For example, the binary number 1011 would be written as 0b1011 in MySQL.