Final answer:
The shortcut to select all control objects in a report in Layout view is Ctrl + A. It is a widely used command in various applications to select all items presented.
Step-by-step explanation:
To select all control objects in a report in Layout view, you should press Ctrl + A. This is a common shortcut across many applications for selecting all items in a window or a document. Note that the other options, such as Ctrl + Shift + A, Ctrl + Alt + A, and Ctrl + Space, do not serve this same purpose. Therefore, the correct option is 'c) Ctrl + A'.