Using a Z pattern is an example of a tactic that can be very effective in keeping the audience involved in the speech. Focusing too much on any one person can make that uncomfortable and also distract the speaker.
Scanning the room in a Z type pattern gives every member of the audience the illusion of being looked at and addressed individually by the speaker. This is useful tactic because people who feel involved will pay more attention to the subject matter.
Well the four aspects of cultural context consist of Setting, Value, Custom and Lifestyle. So therefore answer choice B appearance is naturally wrong because it should be custom.
