Answer to am b, c and d: Irrelevant under US law whether true or not. Possibly interesting from a political standpoint in re how voters might view such actions. But utterly irrelevant from a legal standpoint.
It does not matter whether Indonesia consider(ed) him a citizen, now or in the past. A parent cannot renounce US citizenship for her child. Only an adult US citizen can do so, and it requires quite specific actions, which nobody has claimed Obama ever did.
You cannot unintentionally or accidentally void US citizenship. This is by the law’s design.
Um, that was my original point, but I think it would be more than "possibly" interesting to know that a Presidential candidate has been less than honest about his upbringing, especially when the same candidate has based a major portion of his appeal on his biography. I think we need look no further than the media frenzy about Governor Palin to realize the significance of background.
What's becoming more fascinating though, is the vehemence of those who want to clobber the slightest of criticisms, questions or speculation about Obama's background with a the brute force of a sledgehammer.
Hint: nothing I've said on this thread questioned his standing as a citizen, and yet you felt it necessary to respond with an argument on that point.
As I said, it's fascinating.