A relation R={(1,2),(1,3),(2,4)} is defined from the set A={1,2} to the set B={2,3,4}. Which one of the following statements about R is correct?
a) R is a function because each element of A is related to an element of B.
b) R is not a function because 1 has two images in B.
c) R is a function and its range is {2,3,4}.
d) R is not a function because it contains repeated outputs.