In MS Word 2016, to extend a selection to adjacent cells:

A) Hold down SHIFT and press an arrow key repeatedly 
B) Press Alt + R
C) Ctrl + H + E
D) Alt + End

🧠 Explanation:

In MS Word 2016, holding Shift and pressing an arrow key repeatedly extends selection to adjacent cells in tables. This shortcut is a key topic in software training, engaging users and students. It streamlines table editing, relevant for document creation in business or academia. Understanding this feature enhances Word proficiency, attracting those learning office tools for efficient formatting and data organization in professional reports or academic projects with precision.