A sharp correction will not be sharp if it is not extended.
All sharp corrections are extended. One can not see the internal waves because it is a sharp price-action. The move is fast and deep in a short time. One is dealing with an rapid extension in height or depth of a correction.
Indeed, it is easier for a trader to agree that a sharp correction is an extended price action within a short time than to accept that a corrective wave does extend too.
A normal motive wave (trend) has three impulse waves and two corrective waves. An impulse wave or motive does extend.
Similarly, common corrective waves have two minor "motive waves" and one minor corrective wave. A and C minor waves are "impulse waves" and B minor wave is a corrective wave for the zigzag but a flat correction's A and B minor waves are corrective (double retracement) while the C minor wave is impulsive. That is why the internal structure of flat correction is (3, 3, 5). Right? Yes, it is.
To understand quickly what I have just stated, note that the number 5 refers to impulse while 3 points to a correction.
Will you now agree with me for the first time in your life that corrective waves have their own kind of "impulse" (5) and corrective (3) waves? I hope we have cleared all our misunderstandings on that matter for good.
The internal structure of the zigzag pattern is (5, 3, 5), so it is fair to say that it has two "impulse" (5) and one corrective wave. Those who want to understand more will surely increase their knowledge.
The ABCDE has five minor corrective waves and no impulsive wave because its structure (3, 3, 3, 3, 3).
Evidently, it does not matter whether it a normal impulse wave (motive) or not, an impulse wave (5) whatever it is its nature can be extended.
A and C zigzag's minor waves can be extended like the flat correction's C minor wave.