Explanation: A documented essay or a research paper is a piece of writing in which you incorporate information (facts, arguments, opinions) taken from the writings of experts in a particular field. One of the most important steps to write a documented essay is to choose a good topic, it should be well defined and narrow enough to be covered in the essay. From the given options, the topic that would serve as the subject of a documented essay is "Albert Einstein’s early career" because the other ones are too extensive and general.
Situational irony! Because, she initially thought she was free from her husbands wrath. She celebrated and her heart was happy, this only to end with such a heartbreak that it kills her.