D. he has not been formally dubbed a knight
Answer: A ,trust me I know this.
Explanation:
Answer: "Two French brothers built the first hot air balloon, warming the air inside with smoke so it would rise."
This sentence covers who did the action, what the action was, and the end result. The other sentences on give a partial idea of the sequence and full events.
Spelling
Punctuation
Grammar
Inconsistency
Improving Sentence Construction
etc.
It depends on what piece of work you are looking at - for example: sentence structure is more important in a writing assessment as oppose to a reading assessment.