In comparison, what method is superior to any other methods mentioned in the passage

A．He is puzzled by his grades.
B．He is unclear about his lectures,
C．He is confused by his presentation.
D．He does not know whose course to choose next term.

A．They usually accept responsibility.
B．They blame factors beyond their control.
C．They complain about their personal problems.
D．They compare their behavior to the behavior of others.