What happens when objects of different temperature are placed in a surrounding?

Question

$\begin{array}{1 1} (a)\; \text{heat is transferred until it reaches the maximum temperature} \\ (b)\; \text{heat is transferred until it reaches the minimum temperature } \\ (c)\; \text{heat is transferred until it reaches an equilibrium temperature} \\ (d)\; \text{no heat transfer occurs} \end{array}$