The answer is the first option, true
The poem is about:
B. People should appreciate every moment because some opportunities may never come again.
Explanation:
The poem fondly remembers the days of childhood that one could approach without any care for the future and enjoy the life as it was
This is something that they cannot do as adults but can only be nostalgia to for a time when they could have lived like that.
This is evident in the following lines:
There are days we live
as if death were nowhere
in the background; from joy
to joy to joy, from wing to wing
The days being described here are the ones of childhood and the tone is one of remembrance and sweet nostalgia, and not of dejection at any rate.
Their opinion differs mainly when discussing what they each thought about Julius Caesar. The cobbler is happy to celebrate Caesar's triumph. He goes out to cheer for him, and to celebrate along with other Romans. Flavius and Murellus, however, have a much lower opinion of Caesar and do not share the respect and reverence that the cobbler shows for him.