Which of the Following Statements A), B) or C) Is

Which of the following statements a) , b) or c) is false?

A) For languages like Python that are not natively supported in Hadoop, you must use Hadoop streaming to implement your tasks.
B) In Hadoop streaming, the Python scripts that implement the mapping and reduction steps use network sockets to communicate with Hadoop.
C) Usually, the standard input stream reads from the keyboard and the standard output stream writes to the command line. However, these can be redirected (as Hadoop does) to read from other sources and write to other destinations.
D) All of the above statements are true.