Hey Diddle Diddle

Hey diddle diddle,
The cat and the fiddle,
The cow jumped over the moon,
The little dog laughed to see such sport,
And the dish ran away with the spoon.

This rhyme is thought to date from the sixteenth century when a reference to it was made in a play by Thomas Preston. Its meaning is unclear but has been suggested to refer to

a. The Israelites flight from Egypt

b. Various constellations

c. Catherine of Aragon

d. Catherine the Great

e. A complaint against Catholic priests

f. It has no meaning at all and is a nonsense rhyme