It would help if there is a programming language in the context of which you need this answered. For instance in Python you can create a program like this:
print(type("Hello"))
print(type(1337))
print(type(True))
print(type("3.14"))
It will return:
<class 'str'>
<class 'int'>
<class 'bool'>
<class 'str'>
A you are out of date
B re-install the application and reboot your computer
D)no one
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