70. An unknown compound, C4H8Br2, gave the following NMR spectrum:
Singlet at 1.97 ppm (6H)
Singlet at 3.89 ppm (2H)
What is the structure of the compound?
(A)5ee320686d5a4.jpg
(B)5ee3207864d51.jpg
(C)5ee32088e5ff7.jpg
(D)5ee3209621f8e.jpg
(E) none of the above

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統計： A(0), B(0), C(0), D(3), E(0) #2347846