The error displayed in the following Python code is?

import itertools
l1=(1, 2, 3)
l2=[4, 5, 6]
l=itertools.chain(l1, l2)
print(next(l1))

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