Final answer:
The text in parentheses is not the conclusion of the argument; the conclusion is that the postman will come at 8:30AM today based on the pattern of previous arrivals.
Step-by-step explanation:
The statement "Every day this month the postman has come at 8:30AM." followed by "The postman will come at 8:30AM today" is an example of an argument where the first part serves as the premise and the second part is the conclusion. The text in parentheses is not part of this argument; hence, option b) the parenthesis text IS NOT the argument's conclusion is correct. An argument is a set of statements where the conclusion is supported by one or more premises. In this case, the pattern of the postman's arrival times is the premise concluding that the postman will arrive at the same time today.