Premise 3 is false.

If person can choose A he can equally choose B or C or D etc. However the person only does one. The rest are all fantasy.

Determinism demands an outcome, and humans are the function. A becomes B with[out] you.

Sabine Hossenfelder's video on free will discusses this much more succinctly, with an ontological framework that has some basis in the metaphysical.

Huemer fails to address human perception's role in deciding the epistemology of this argument.