Which of the Following Describes the Postembryonic Development, Called Complete

Which of the following describes the postembryonic development, called complete metamorphosis, in members of the order Diptera (flies) ?

A) a single, wingless nymph instar followed by several winged adult instars
B) a series of young instars that become more and more like an adult, ending with a wingless adult instar
C) a series of nymph instars that lack functional wings, ending with an adult instar with functional wings
D) several instars of often wormlike larvae, followed by a stage where they are a sessile pupa, and then ending in an adult stage that is very different from the larval instars