Disregarding RTFQ, Integrated course graduates are not necessarily popular because they have so few hours. Having said that, the airlines decided between themselves long ago that self-improvers were not desirable, as the core training was inconsistent and so many bad habits had to be ironed out, which costs time and money.
Ex military pilots are good with the emergencies, and have the hours, but need a certain commercial reorientation. However, some airlines like these, especially if they are "management graduates".
As a Chief Pilot, I would not hire anybody who offered to work for nothing, because it shows a certain lack of self-esteem. Not only that, training is tax deductible for a company, and none of the companies I ran would ever use a potential pilot that way. If it was a fresh type rating (i.e. less than 10-15 hours), unless it was from a known training source, I would do it all over again. Over 50 hours, I probably wouldn't bother. Granted, for a large aircraft, the source would no doubt be reputable, but where type ratings are required for everything (as they are in the helicopter world), it's a good policy.
Choice A.
phil