How do you defend against the Alapin line in the Sicilian?

Possibly of interest:
Starting Out: The Sicilian, 2nd Edition
https://web.archive.org/web/20140627122350/http://www.chesscafe.com/text/hansen123.pdf
Anti-Sicilians: Move by Move
Sveshnikov vs. the Anti-Sicilians
https://www.newinchess.com/media/wysiwyg/product_pdf/9003.pdf
http://www.jeremysilman.com/shop/pc/Sveshnikov-vs-The-Anti-Sicilians-76p3890.htm
Grandmaster Repertoire 6A - Beating the Anti-Sicilians by Vassilios Kotronias
http://www.qualitychess.co.uk/ebooks/BeatingtheAnti-Sicilians-excerpt.pdf

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. cxd4 Nc6 White has a long pawn chain, but it is an illusion as it is difficult to defend. I have good results with this approach (it is also how I handle the Smith-Morra).
+1

e4 c5 c3 and move e6, your opponent will then usually go with d4 and you reply with d5, if your opponent moves e5, congratulations, you just changed Sicilian into French.

I try to transpose to the advance variation of the French Defense depending on the move order. I also like this gambit line:

I try to transpose to the advance variation of the French Defense depending on the move order. I also like this gambit line:
I do not understand why a Sicilian player would want to make this transposition. If you wanted to play the French, why play 1. c5 to begin with?
I love playing against the advance variation of the French but I don't like starting with e6 as White can play the exchange variation. I like asymmetrical pawn structures to keep the game more dynamic.