What is the most likely meaning of the phrase "Cook and Tupaia closed the circle" at the end of the following passage

don't come near me, i might sneeze on you

explanation:

the sentence that best describes the tone of the passage from the radio broadcast compared to the passage from the book is b. the radio broadcast has a more surprised tone.

consider the text evidence: in the passage from the book, the description is more matter-of-fact. it is simply describing the things resembling little grey snakes, but there is no urgency in the description. on the other hand, in the passage from the radio broadcast, there is definetely urgency (you can tell from the expression used, "good heavens", which clearly indicates surprise.)

based on the graph, people who are asian/ pacific islander, are better at math than the other race/ethnicity's on the graph.