Answer:
c). Task
Step-by-step explanation:
As per the question, if an individual is writing an expository essay in order to examine an idea, assess the available evidence to discover if the idea has its validity, and then bring forth a worthy argument to display that idea, it is his/her task which he/she might have been assigned to or doing willfully. Such essays aim to depict an idea in a clear, precise, and coherent manner after the required research and analysis so that the readers are informed with accurate and objective information. Thus, option c is the correct answer.