What do 1, 2, 3 and 4 in the processes shown below represent? \[Water\xrightarrow{1}Steam\xrightarrow{2}Water\] \[Ice\xrightarrow{3}Water\xrightarrow{4}Steam\]

• A.  1-heat, 2-cool, 3-cool, 4-heat
• B.  1-heat, 2-cool, 3-heat, 4-heat  
• C.  Freezing
• D.  1-cool, 2-cool, 3-heat, 4-cool