Determine whether the relation defines a function, and give the domain and range.
{(1, 2), (5, 4), (9, 7), (3, 8)}
Is the relation a function?
A. No, because each element of the domain (first component) is distinct and corresponds to exactly one range element (second component).
B. Yes, because each element of the domain (first component) is distinct and corresponds to exactly one range element (second component).
C. No, because not all the elements of the domain (first component) are distinct and correspond to exactly one range element (second component).
D. Yes, because not all of the elements of the domain (first component) are distinct and correspond to exactly one range element (second component).

Give the domain. Select the correct choice below and fill in the answer box to complete your choice.
A. The domain is the interval
nothing.
(Type your answer in interval notation.)
B. The domain is the set StartSet nothing EndSet

(Use a comma to separate answers as needed. Type each answer only once.)
Give the range. Select the correct choice below and fill in the answer box to complete your choice.
A. The range is the set StartSet nothing EndSet
.
(Use a comma to separate answers as needed. Type each answer only once.)
B. The range is the interval
nothing.
(Type your answer in interval notation.)