Consider the following file diagram: Also consider the following Python code: output $=$ open$("$roster$.$txt$","$a$")$ Based on the diagram and code statement, which one of the following is true?Consider the following file diagram:

Also consider the following Python code:

output $=$ open$("$roster$.$txt$","$a$")$

Based on the diagram and code statement, which one of the following

is true?

This statement causes a "file not found error" to occur

This statement opens the roster.txt file for reading

This statement executed from inside the

myRoster.py file

This statement writes over the roster.txt file