Is the following Python code valid?

try:
    # Do something
except:
    # Do something
else:
    # Do something

A. To handle runtime errors and prevent the program from crashing B. To print error messages C. To ignore errors D. To enhance program speed

A. when there is no exception B. when there is an exception C. only if some condition that has been specified is satisfied D. always

A. An error that occurs during the execution of a program B. A built-in function C. A keyword D. A specific data type

A. zero B. one C. more than one D. more than zero