The correct answer is the following.
The statement that distinguishes autobiographical memory from general memory is "The role of emotion in shaping autobiographical memory may be less applicable to other kinds of memory."
We could say that autobiographical memory is the way individual events are stored in our brain. It is the memory from which we can retrieve the most important memories in our life. It includes knowledge, experiences, and moments -good or bad- that have marked our life on Earth.
That is why emotions are an important component of this memory. Because emotion imprints a special component so we can find it relatively fast for the feeling it produces us when remembering that event.