Consider the SinglyLinkedList class. When size > 0, which of these expressions are both meaningful AND must be true?

(by "meaningful" we mean that the code doesn't cause a NullPointerException)

Group of answer choices

A.head == tail

B.tail.next == null

C.head.next == tail

D.isEmpty() returns false

E.head != null

F.tail != null

G.head.element != null

H.tail.element != null

I.tail.element == null