Respuesta :
Answer: I would contend that the right answer is the B) But only so an hour.
Explanation: Just to elaborate a little on the answer, it can be added that this explicit reference to time is, I believe, the one that suggests that youth passes quickly. That early spring leaf is a flower, but it only remains a flower for an hour. Spring has traditionally been associated with youth and life, so it is possible to relate the emergence of that fresh, yet fleeting, flower with the young years of a person's life.