Dell,a Problem-Solving Amateur,is Trying to Solve the "Hobbits and Orcs

question 7

Multiple Choice

Dell,a problem-solving amateur,is trying to solve the "hobbits and orcs" problem,and so she must determine how to move the creatures across a river.Dell is most likely to be helped if she has had earlier experience with

• A)a problem with a similar structure and which also involved hobbits and orcs.
• B)a problem with the same structure,but which involved protecting wives from their jealous husbands.
• C)other problems involving transportation across obstacles.
• D)problems illustrating the techniques for dealing with river currents.

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Definitions:

Sodium

A chemical element (Na) that is essential for human health, notably in the regulation of fluids and blood pressure.

ADH

Antidiuretic Hormone, also known as vasopressin; a hormone released by the pituitary gland that regulates water balance in the body by reducing urine output.

Collecting Duct

Part of the nephron in the kidney that is responsible for the concentration of urine and the reabsorption of water into the bloodstream.

Malpighian Tubules

Excretory structures found in some insects that remove waste products from the body and maintain osmotic balance.