When you use a mouse to select a row or column in a table,Word displays a(n) ____.

A) building block
B) Insert Control
C) hyperlink
D) block style

When you use a mouse to select a row or column in a table, Word displays an Insert Control. The Insert Control allows you to insert or delete rows or columns easily. Option A is incorrect because building blocks are preformatted contents such as headers or footers, which can be inserted into a document. Option C is incorrect because a hyperlink is a clickable link that navigates to a different location. Option D is also incorrect because block style refers to a specific formatting style used in typography, which is not related to selecting rows or columns in a table.