Let A={∅}A = \{\emptyset\}A={∅} and B={A,∅}B = \{A, \emptyset\}B={A,∅}. Which of the following represents the Cartesian product A×BA \times BA×B?
{(∅,A),(∅,∅)}\{(\emptyset, A), (\emptyset, \emptyset)\}{(∅,A),(∅,∅)}
{(∅,∅)}\{(\emptyset, \emptyset)\}{(∅,∅)}
{(A,A),(A,∅)}\{(A, A), (A, \emptyset)\}{(A,A),(A,∅)}
{(∅,{∅,∅})}\{(\emptyset, \{\emptyset, \emptyset\})\}{(∅,{∅,∅})}