In order to be able to choose the correct answer, we must first understand all the options available and then gather the meaning in the sentence to best choose an option. To assert is to state that something is true, or right, sometimes in a very passionate and even agressive way. Fastidious talks about a behavior towards an event, or an action, so literally, being meticulous or methodical, also being very careful with something. To quibble means to try to avoid something by making use of words and rant means to talk, or make a statement, using emotions and showing excitement or passion about something. In this sentence, the person talked about is performing an action that results from the emotions generated by the outcome of the last election. This action is related to the verbal outpour of the emotions generated by the results and the only word that relates both to an action, verbalization of emotions and emotions themselves is C, rant.
