Answer:
c. 2 (True and False)
Step-by-step explanation:
A boolean variable is a variable that can only have two possible values: true or false. In programming, it is often used to represent conditions or logical expressions. For example, a boolean variable can be used to determine if a certain condition is met or not, and then execute a certain block of code accordingly.
Option C is the correct answer since a boolean variable can only take two values: True or False. Option A returns an integer value of 10, option B is a function that rounds a floating-point number to a specified number of decimal places, and option D is invalid syntax for printing the last character of a string in Python.