Where this block appears
A) This tell us where the block was originally created.
B) This determines what pages the block will be displayed on. Any page means that it will be shown on all pages within the course.
C) This determines whether the block will show on the left or right side of the page by default.
D) This determines in what order the block will appear on the page, compared to other blocks, with -10 being at the top of the page.