Read the sentence below about the Chicago fire of 1871. Many people tried very hard to save the building of the Chicago Tribune.

Which revision is the best example of adding concrete detail?

A. Many people tried very hard for a very long time to save the Chicago Tribune building during the fire.

B. In an attempt to save the Chicago Tribune building, men stayed on the roof for as long as possible during the fire.

C. In an attempt to save the Chicago Tribune building, men stayed on the roof for as long as possible during the fire, keeping it wet and stamping out cinders.

D. Many people kept the roof of the building wet and stamped out cinders, trying to stop it from being enveloped in flames as the fire spread very quickly.