If A={x:x2=4}A = \{x : x^2 = 4\}A={x:x2=4} and B={x:x3=8}B = \{x : x^3 = 8\}B={x:x3=8}, what is A∩BA \cap BA∩B?
{2}\{2\}{2}
{−2,2}\{-2, 2\}{−2,2}
∅\emptyset∅
{2,4}\{2, 4\}{2,4}