Which of the following choices best uses precise and domain-specific language to convey its message?

A. It may sound gnarly, but these pretty cute birds are super spreaders of sickness when they release waste and when parts of their body touch things.

B. Ornithologists say that these birds can leave behind gross diseases where they end up landing or using the bathroom.

C. Research by bird scientists show that European Starlings can spread things when they go to the bathroom or land on things.

D. Studies conducted by ornithologists demonstrate that European Starlings transmit disease both biologically through their waste and mechanically through their beaks and feet.