A: The use inalienable means rights in question can under some circumstances be changed. Had you used unalienable as was used in the Constitution it would have meant they could not be changed under any circumstances.
Individual rights are not fundamental, but derived from antecedent arguments. Metaphysical axioms (fundamental) lead to epistemological truths lead to objective ethics lead to the political doctrine of individual rights. For more I recommend reading Objectivism: The Philosophy of Ayn Rand by Leonard Peikoff. Best wishes.
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B: Or it meant you used a PC dictionary
C: Or you can't spell.
D: Or you weren't referring to the Constitution.
A B C D. But A is A.