The task of history is to make people understand the causal relationship inherent in the historical process through the retrospection of the elapsed years and the correct disclosure of historical laws, so as to gain wisdom and better connect the past and the future. What's the central meaning of this passage? ['History accomplishes its task by revealing the laws of history.', 'History enables people to gain wisdom from the past.', 'History can help people summarize the past and face the future.', 'The task of history is to tell people how to reveal the laws of history.']