Select the most appropriate meaning of the given idiom.

A bird's eye view

A general study / view

The most appropriate meaning of the idiom "a bird's eye view" is a general study / view. This idiom means that you are looking at something from a high vantage point, so that you can see the whole picture. The image of a bird's eye view is one of being able to see everything at once, and so the idiom is used to describe a situation where you have a good understanding of the overall situation.

The other options for the meaning of the idiom are not accurate. To get into trouble means to find oneself in a difficult or unpleasant situation. To be major means to be of great importance or significance. By all means means certainly or definitely.