Question

There is indeed another custom, which I cannot altogether approve of: when the king has a mind to put any of his nobles to death in a gentle indulgent manner, he commands to have the floor strewn with a certain brown powder of a deadly composition, which being licked up, infallibly kills him in twenty-four hours.

What information about the Luggnaggians does the narrator (Gulliver) provide to his audience (English people)?

their religious beliefs
their traditional customs
their educational institutions
their military capacity