Suppose Rachel wants to read more about the spaghetti trees. She would find most of the information

B . In a book about April Fools news stories .

Explanation:

The news about the harvesting of spaghetti by a family in Switzerland was broadcasted by the BBC on April Fool's Day of 1957. While the item spaghetti was relatively unknown in among the British during that time, most news viewers approached the BBC asking about the planting of such trees.

So, if Rachel wants to read more about the spaghetti tree, she should look for the information in a book about April Fools’ news stories.

Thus, the correct answer is option B.