Which is an example of a precipitation reaction?

A.
A solution of HCl mixes with a solution of NaOH to produce a solution of NaCl.

B.
A solution of AgNO3 mixes with a solution of NaCl to produce solid AgCl and a solution of NaNO3.

C.
Solid C6H12O6 combines with O2 gas to produce CO2 gas and H2O gas.

D.
Solid Fe combines with O2 gas to produce solid Fe2O3.