3. Given the elements of A ={1,2,3 } and B={3,4,5,7,9} What is AUB?
A AUB={1,2,3,4,5,8,9,10}
B, AUB={1,2,3,4,5,6,7}
C. AUB=(1,2,3,4,5,7,9)
D. AUB= {3,4,5,6,7,8,9,10)​