It is a Climax of a story
Being successful is about learning from the mistakes you have made, hence not making it again as you have learnt your lesson and in keeping with that make better decisions next time.
The answer is their because "the girls" is plural, meaning more than 1 girl is being addressed. Therefore, the answer cannot be her.
The answer is A. vegetable. It basically tells you directly that Spinach is the vegetable in the Garden.