Choose the option that punctuates the following sentence correctly: Last year we went to London Paris and Prague *
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A: Last year, we went to London, Paris and Prague.

B: Last year, we went to London, Paris and Prague!

C: Last year we went to London, Paris, and Prague.

D: Last year we went to London, Paris and Prague.

E: Last year, we went to London, Paris, and Prague.

F: Last year, we went to London, Paris, and Prague!!