A proposed reaction mechanism is given below. Give the overall (i.e. chemical) equation for this reaction. A + A ---> A2                          (slow) A2 + B ---> C + D                    (fast) C + B ---> E + D                      (fast)单项选择题

A

A + A ---> E + D

B

A + A ---> A2

C

2A + B ---> E + D

D

2A + 2B ---> E + 2D

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