When Joe arrives at the library, he can choose from any of several strategies that might help him find the book he needs. He could examine all the books on every shelf, and be certain that he would eventually find the book he wants, but this strategy would take too long. Joe decides instead to ask a librarian to direct him to the appropriate section of the library. Joe is using .

A heuristic

Explanation:

A heuristic is an approach to problem solving in which previous experiences are used to develop or derive a strategy to solve a problem. This method does not necessarily mean that it will be perfect for the goal or problem, but it is sufficient to provide a quick access (like a shortcuts) to the solution given the time frame. This is the reason why Joe asked the librarian, because this would save him a lot of time, and this would provide quick access to the book he is looking for. He then banks on the experience of the librarian to help him locate the book in a very short period of time instead of examining all books on the shelf.

the purpose of the heading in the passage is to identify who is telling the story.

this excerpt is part of the book sugar changed the world (2010) written by marc aronson and marina budhos. as the book has been written by two people, the heading "marc" indicates that this specific excerpt is being narrated by aronson. in the fragment, marc describes his grandfather's story after hearing it from his cousin. however, there are other excerpts where budhos is the one that tells the story of her family.

aronson and budhos, who are husband and wife in real life, decided to write sugar changed the world when they found out how sugar, which had an important role in slavery and economy, changed their ancestors' lives.

explanation:

the answer to your question is d because the clause conveys the tone of the man in the excerpt, which is arrogant and cocky. hope that .