The revision that best corrects the error in the sentence is sentence C. Sentence C is the best construction by putting together the information in a participle phrase and using <em>raced</em> as the main verb in the sentence.
A participle phrase begins with a present or past participle. In this case, it starts with the past participle <em>armed with their bats, balls, and mitts. </em>Since all phrases require two or more words, a participle phrase will often include objects and/or modifiers that complete the thought (the PP <em>with their bats, balls, and mitts</em>). What is more, they always function as adjectives, adding description to the sentence. In this case, the past participle modifies the NP <em>the team.</em>