What Is the Purpose of the Xargs Command

What is the purpose of the xargs command?

A) It passes arguments to an X server.
B) It repeats the execution of a command using different parameters for each invocation.
C) It reads standard input and builds up commands to execute.
D) It asks a question, graphically, and returns the response to the shell.
E) It allows specifying long options (like --help ) for commands that normally only accept short options (like -h ) It allows specifying long options (like --help ) for commands that normally only accept short options (like -h )