Respuesta :
The type of outside source MacGregor used is a historical website. You can understand more about historical website below.
The historical website should be an accumulation of research and argument that incorporates textual and non-textual.
What is a historical website?
This is a collection of web pages interconnected with hyperlinks that present primary and secondary sources, interactive multimedia, and historical analysis.
In the excerpt, it is seen that MacGregor made use of hyperlinks which made it easy to detect the use of historical website as his outside source.
Therefore, the correct answer is option D.
Read more about website here:
https://brainly.com/question/25941596
