|q⟩ Bad Qubits

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Multiple choice
After running this circuit, what is the probability of measuring |0⟩?
⚛ The apparatus
const c = circuit(1);
c.h(0);           // prepare |+>
c.h(0);           // basis rotation: X eigenbasis -> computational basis
c.measure();
return c;

Commit your prediction for P(|0⟩) — then run it.