If a class defines the __str__(self) method, for an object obj for the class, you can use which command to invoke the __str__ method.

A. "Hello, World!" B. 'Hello, World!' C. "Hello, World!' D. 'Hello, World!"

A. t B. h C. o D. y

A. Returns the length of the string B. Converts the string to lowercase C. Converts the string to uppercase D. Removes leading whitespace

A. . (period) B. , (comma) C. : (colon) D. [ and ] (square brackets)