a) A labeled diagram is an important component of an effective set of instructions.

b) “Thanking you in anticipation” is a good ending to a business letter.

c) A set of instructions should always end with a list of cautions and warnings.

d) Lack of interest in a topic is a receiver-oriented barrier.

a) A labeled diagram is an important component of an effective set of instructions. -True

Labelled diagram must be drawn along with instruction for user friendly environment.

b) “Thanking you in anticipation” is a good ending to a business letter. -False

Rather a full sentence for express your thanks is always preferred. E.g. your kind attention to this matter would be appreciated.

c) A set of instructions should always end with a list of cautions and warnings. -True

Cautions and warnings must be mentioned for safe handling of any kind of users.

d) Lack of interest in a topic is a receiver-oriented barrier. -True

If receiver himself/herself don’t have interest, it becomes very difficult to understand the concept of what speaker wants to say.