I don't know if I'm completely correct, so please don't get mad at me, but I do think that the answer is B. If you think about it, modern poetry has far fewer rules than it used to. Free verse has become a very popular form of poetry, and that is my reasoning. I hope this is helpful!
A simple sentence consists of only 1 clause. examples: 1. Joe waited for the train. 2. the train was late. 3. Fred and Dobby took the bus.
Answer: nine years.
Explanation: according to the given prompt, the tree doubled its height each year, therefore we can also say that no matter what year we are in (in the ten years limit), the year before, the tree was half of its size. So, if the tree reaches its maximum height in ten years, that means that the year before that (year number nine), the tree was half of its maximum height. So the answer is nine years.