I would say B and C.
Not A becuz it sounds like a paper, not a presentation.
Not D because the powerpoint is the presenation form of a word doc.
A. .ods is a spreadsheet file format used by OpenOffice/StarOffice, for sharing.
B. .ppt is a powerpoint.
C. .odp is a file extension for a presentation file format.
D. .doc is a word document.
I hope that helps!!! =)
