Which of the following sentences shows correct capitalization AND punctuation?

A.
During Summer breaks, I have traveled to London Paris, Madrid and Berlin, but my favorite vacation spot is venice, Italy
B.
During summer breaks, I have traveled to London, Paris, Madrid, and Berlin, but my favorite vacation spot is Venice, Italy.
C.
During summer breaks I have traveled to London, Paris, Madrid, and Berlin but my favorite Vacation spot is Venice Italy.
D.
During Summer Breaks, i have traveled to London, Paris, Madrid, and Berlin, but my favorite vacation spot is Venice Italy.

B.

During summer breaks, I have traveled to London, Paris, Madrid, and Berlin, but my favorite vacation spot is Venice, Italy.

The correct sentence that shows proper capitalization and punctuation is:

B. During summer breaks, I have traveled to London, Paris, Madrid, and Berlin, but my favorite vacation spot is Venice, Italy.

The correct answer is B:

During summer breaks, I have traveled to London, Paris, Madrid, and Berlin, but my favorite vacation spot is Venice, Italy.

Explanation:

When it comes to capitalization, proper nouns, such as names of places (London, Paris, Madrid, Berlin, and Venice) and specific titles (Italy), should be capitalized. In addition, the first word of a sentence (During) should also be capitalized.

In terms of punctuation, commas should be included after each city name (London, Paris, Madrid, and Berlin) to separate them in a list. Commas should also be used after the introductory phrase (During summer breaks), as well as before the coordinating conjunction "but" to separate the two independent clauses.

Based on these rules, sentence B correctly demonstrates both proper capitalization and punctuation.