Rey Received the Highest Grade on Test #1

Rey received the highest grade on Test #1. Spencer, who is not Rey, received a grade on Test #1. So, Rey's grade is higher than Spencer's. (r: Rey; s: Spencer; t: Test #1; Gxy: x is a grade on y; Hxy: x is higher than y; Rxy: x received y)
-Which of the following claims can also be derived from the premises of this argument?

A) (∃x) (∃y) (Gxt • Gyt • Hxy)
B) (∀x) [Gxt ⊃ (∃y) (Hxy • Gyt) ]
C) (∀x) (∀y) (Hxy ⊃ ~Hyx)
D) (∃x) (∀y) [(Gxt • Gyt) ⊃ Hyx]
E) (∃x) (∃y) (∃z) (Gxt • Gyt • Gzt • x≠y • y≠z • x≠z)

Correct Answer:

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