Plz I need someone help me on these too ( fill in the blanks : can , couldn’t, may, mustn’t, can’t )

The one certain thing about the message you sent to the receiver is that the receiver will: a)process the information sequentially, not simultaneously. b)interpret it based on their framework of experience. c)not be able to interpret all the relevant information. d)revise his/her premises according to the information sent.

In this unit we learned about arguments and rhetoric. in an argument we use ,not informal language

Accepted is to fact as unproven is to