The answer is variant B verb because it exprime an action made by the subject.
The correct answer among all the other choices is A)We cannot do as much as the soldiers have done. This is the best paraphrase of this quotation from Abraham Lincoln's Gettysburg Address. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.
Answer:
umm
1)maybe it's dangerous in some situations that if he didn't know how to drive maybe they will die
Explanation:
2)the people will stop taking driving lessons cuz they waited too long
