Final answer:
The correct answer is 2) To open an object in default view, double-click it in the Navigation bar.
Step-by-step explanation:
The correct answer is 2) To open an object in default view, double-click it in the Navigation bar. The other three options mentioned are all methods used to open or switch views.
Option 1) involves right-clicking the object in the Navigation Pane and selecting Design View. Option 3) requires clicking on the View arrow in the Views group on the Home tab and selecting the preferred view.
Option 4) involves right-clicking the object tab and selecting the preferred view.