3. Circle the word that should be capitalized in the sentence. Charles and frank Duryea tested their first engine on a used horse carriage.

Did you know that the Duryea brothers, Charles and Frank, were pioneers in the automotive industry? They founded the first American automobile manufacturing company in 1896 and were instrumental in the development of early gasoline engines, significantly contributing to the future of transportation! If you're keen on avoiding capitalization mistakes, remember: proper nouns—including names of people, places, and specific organizations—always need a capital letter! A simple trick is to ask yourself if the word refers to a unique entity—if yes, it deserves that uppercase treatment!