I believe your answer would be C. Have ridden. Hope this helps and have a fantastic day.
I would say the correct answer is that has an undetermined answer.If a subject has been thoroughly covered, then there is no need for this researcher to do it all over again. If it's impossible to answer, there is no need to try. If it can be answered easily, then it doesn't really require a research. This leaves us with the last option, because a researcher might want to try and determine the answer.
Answer:
1st one is passive second one is the action is more important than the performer
Explanation:
Edgunity 2020
After reading the poem, I can say it is All of the above.