I'm having trouble with this question.

Question

Why would you mount an overhead transparency in a cardboard frame?
A to make copies of it
B to color it
C to add overlays
D to project it onto a screen
Can someone please help me.

Answer 1

I'm amazed they're asking you that question. It's so 1980s!!

http://books.google.com/books?id=-RjX3sz4BBUC&pg=PA148&lpg=PA148&dq=overhead+transparency+frames&source=bl&ots=RcxO-C6l-7&sig=dfyJD2nocuVhcuOCOT08Goy65OM&hl=en&ei=7tG2TbriMdCXtweWvaWLAQ&sa=X&oi=book_result&ct=result&resnum=9&ved=0CIQBEOgBMAg#v=onepage&q=overhead%20transparency%20frames&f=false

Read carefully. Your answer is there.

Answer 2

to add overlays
answer;C

Answer 3

answer; c
to add overlays