Given a prompt and four completions, select the completion that is the most plausible in continuing or answering the prompt. This task is designed to test common sense and has various categories ranging between idioms, negated statements, polysemy, subject referencing, and quantitative reasoning. Generate either Completion A, Completion B, Completion C, or Completion D.

Prompt: Ketchup dates back as far as 1600 AD, when sailors traveling to China discovered a sauce called ketsiap. It 
Completion A: was easy to make ketchup boats during that time. 
Completion B: quickly changed ingredients to include sofa and toilet. 
Completion C: began the transformation to today's sweet potato in the late 1700s. 
Completion D: was a sauce that was made out of soy or oysters and didn't contain tomatoes.
Completion D

Prompt: The father denounced his son for his misdeeds. The son 
Completion A: took his family out for dinner 
Completion B: did not understand the probability theory 
Completion C: apologized for his mistake 
Completion D: lived happily ever after
Completion C

Prompt: I type on my computer. I 
Completion A: slam a textbook on the keyboard. 
Completion B: write on the computer screen. 
Completion C: write out an email. 
Completion D: put the keyboard on the table.

Completion C