Although darwin was cautious about making his theories public, what event finally prodded him to publish, on the origin of species?

receiving a letter from wallace describing wallace's theory of natural selection.
his reading malthus' an essay on the principle of population.
his return from his voyage on the hms beagle.
the interest expressed by writers and political thinkers in his theory of natural selection.

Arrange the events below in chronological order. claudius and polonius hide themselves and listen in on hamlet's conversation with ophelia. claudius decides that hamlet's madness is not caused by neglected love and that he is dangerous. rosencrantz and guildenstern tell claudius that they still do not know the cause of hamlet's behavior. polonius suggests that he will hide and listen as the queen talks with hamlet.