Which of the Following Changes Represents a Physical Change, Rather

Which of the following changes represents a physical change, rather than evidence of a chemical reaction?

A) When a piece of zinc metal is placed in a solution of HCl, bubbles begin to form, and the zinc begins to dissolve.
B) When solid ammonium carbonate, (NH₄) ₂CO₃, is heated, the solid disappears, and gaseous ammonia (NH₃) , carbon dioxide (CO₂) , and water (H₂O) are formed.
C) When dry ice (solid CO₂) is allowed to stand at room temperature, a white cloud and gaseous CO₂ are formed.
D) When a solution of KI is mixed with a solution of Pb(NO₃) ₂, a yellow solid is formed.
E) When a piece of copper wire is placed in a solution of AgNO₃, a silvery solid begins to form on the surface of the wire, and the solution turns blue.