If a set A={1,2,3}A = \{1, 2, 3\}A={1,2,3} and set B={3,4,5}B = \{3, 4, 5\}B={3,4,5}, what is the union A∪BA \cup BA∪B?
∅\emptyset∅
{3}\text{\{3\}}{3}
{1, 2, 3, 4, 5}\text{\{1, 2, 3, 4, 5\}}{1, 2, 3, 4, 5}
{1, 2, 4, 5}\text{\{1, 2, 4, 5\}}{1, 2, 4, 5}