Answer:
It's the ability to recover quickly from difficult situations. To be able to deal with them. It's a bit like being flexible. And once something is knocked down fore example, that thing/person is able to get back up quickly and go through the tough situation well.
B. subject because <em>I </em> is "doing" the subject.
I do know is the subject and verb.
The answer is C. Because it gave the most excitement to the sentence cuz its like hurry up cuz something is coming or they late etc.
Hope This Helps !