Which One of the Following Alternatives Best Illustrates the Notion

Multiple Choice

Which one of the following alternatives best illustrates the notion of a personal theory?

A) Agnes has memorized the formula a² + b² = c², but she cannot remember what the formula is called or what it's used for.
B) Bert has memorized the formula a² + b² = c² and also knows that it's called the Pythagorean theorem; however, he doesn't know in what situations it is useful.
C) Christine is familiar with the formula a² + b² = c²; furthermore, she knows that the Pythagorean theorem provides a means of predicting the hypotenuse of a right triangle when the lengths of the other two sides are known.
D) Darnell thinks of living creatures as being defined in terms of their biological origins, but he thinks of manmade objects as being defined in terms of their functions.