Which would be the best way to combine the following

Last updated: 7/20/2022

Which would be the best way to combine the following sentences using an adjective clause? Mr. Kold's timepiece was synchronized to the clock tower. He always carried it. A. Mr. Kold's timepiece that he always carried, was synchronized to the clock tower. B. Mr. Kold's timepiece that he always carried was synchronized to the clock tower. C. Mr. Kold's timepiece, that he always carried, was synchronized to the clock tower.