When Hector has multiple school assignments, he always works on each assignment in the order it was received. For instance, if he received an assignment to write a paper on Monday and an assignment to contribute to a Packback Discussion on Thursday, he will work on the paper first and not start the discussion post until the paper is complete. What priority scheduling method does this scenario illustrate?

Group of answer choices

Earliest due date

Last in$,$ first out

Shortest operating time

First come, first served