Specifying the number of decimal places and special characters to display in a number is called as . . . . . . . .

The correct answer is B. Formatting.

Formatting is the process of specifying the appearance of text or numbers in a document. It can include setting the font, font size, font color, alignment, and other attributes. Formatting can also be used to specify the number of decimal places and special characters to display in a number.

Option A, Including, is incorrect because it does not accurately describe the process of formatting a number. Option C, Emphasizing, is incorrect because it does not accurately describe the purpose of formatting a number. Option D, Promoting, is incorrect because it does not accurately describe the process of formatting a number.