D. A usually contains detailed comments about something in the text. i. Footer
ii Footnote
Hii Header
iv. none of these​

Foot note

Explanation:

The option that contains detailed comments about something in the text is simply referred to as the foot note.

A footnote is simply refered to as the note that is at the bottom of a particular page which gives more information about a particular thing.

Therefore, based on the options given, the answer is B.

leaning back,   no eye contact,   fidgeting in the seat