$8$

$0/1$ point

string substr $($size$\_$t pos $=0,$ size$\_$t len $=$ npos$)$ const;

The above prototype for the substr method identifies default values for the pos and len parameters.

string greeting $=$ "Hello World!";

string str $=$ greeting. substr$()$;

What value would be stored in str by the above code segment?

"Hello"

"World!"

"Hello World!"

"greeting"