The definition of the prefix im- is no or not and it implies the opposite meaning of the word to which is added.
In this case, it means irrelevant, unimportant, of no essential consequence or incorporeal.
The answer is C, a section of a story in which events take place. When some one makes a scene at a store, they draw attention to themselves from their actions, this is a good example to help you better understand the definition of a scene.
Cool. i can speak english & spanish and im learning japanese and korean ^^