Which of the Following Most Closely Expresses the Principle of Occam's

Multiple Choice

Which of the following most closely expresses the principle of Occam's razor as it applies to theoretical explanations of physical phenomena?

A) The theory that has the longest history is the most likely explanation.
B) The theory requiring the most assumptions is the most likely explanation.
C) The newest theory is most likely to be the correct one.
D) The theory requiring the fewest assumptions is the most likely explanation.