Which file mode flag specifies that open$()$ should open a file for writing, create it if it does not exist, and truncate the file if it does.

Question $2$ options:

$\text{'}$t$\text{'}$

$\text{'}$a$\text{'}$

$\text{'}$r$\text{'}$

$\text{'}$w$\text{'}$

Any of the above specify this behavior.