One joule means that

• A. work is done by a force of 1 N when it displaces a body through 1m
• B. work is done by a force of 1 kg when it displaces a body through 1 m
• C. work is done by a force of 1 dyne when it displaces a body through 1 cm
• D. work is done by a force of 1 g when it displaces a body through 1 cm