<span>A complex sentence contains a subordinate clause or clauses: So, A is correct.</span>
Probably D. After all,it’s the most prolific time of his life(I am not sure tho)
Weather is like a feather
Can be so soft, but also very tough
Weather is warm, weather is cold.
I like today’s weather… Cold and snow!
Him.
If you don't know how to solve this, you can put each word in to the blank and see which sounds right.