You should chose D. B. would also work, but D. is best. Always put a comma before a name.
Explanation:
the major problem all over the world is unemployment
Answer:
The gardener seen the leaves dancing in the wind.
Answer:
The definition of "tone" in literature is the way the author expresses his attitude through his writing. The tone can change very quickly or may remain the same throughout the story. Tone is expressed by your use of syntax, your point of view, your diction, and the level of formality in your writing.
Explanation: Hope it helps!!
Sorry I accidently put it in the comments and not the answer!
The fire made humans greedy and started conflict with humans
