Which extension is appropriate for word document templates?
.docx
dotx
.docm
none of the above

The answer to this question is the option "dotx".

Explanation:

The answer to this question is dotx. The term dotx is part of the Microsoft Corporation. this is a file format that is used for Open XML Format Template in the MS-Word 2016.  

It is a file extension that is used for creating templates.  

It includes many features like default layouts and settings for a document, including styles, Toolbar, etc.

And all other options are not correct that can be described as:  

The docx is a word file extension used to save text and images in file.

The .docm is a file extension that is present in MS-word 2007 and 2010. This is used for excepts an execute macros, which is automate repetitive tasks in Word.  

That's why the answer is "dotx".

i do believe its (c); they are required to perform any summarization or redistribution tasks

explanation:

answer; the above statement is (true);