My comments before were about yet another choice: connect IC power or
power+ground pins to planes using traces, and then connect the cap to the IC
end of those traces.
Choice #3 as stated may not be good because the traces isolate the IC from
all HF bypassing; both the planes and the capacitor are on the other end of
the traces. But if your IC generates mega power noise, and doesn't care if
its power pin is noisy or not bypassed, then choice #3 could be acceptable.
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