At the beginning of the poem, he says why he does not love her. He doesn't love her as if she was a salt-rose, topaz, or carnation, but he loves her as if she was a plant that does not bloom. This means that he does not love her superficially, but he loves her deeply for who she is on the inside.
Flowers are beautiful things that everyone admires, but no one would admire a flower that doesn’t bloom because they could not see the beauty that it contains.
For me, personally, Romeo's love never seemed real, especially if you take into consideration that Romeo and Juliet knew each other for about a month, or so. You cannot start loving someone in such a short period of time, especially given that Romeo is like 18, and Juliet 14.
Compared to modern ideas of love, their love is much more romanticized, it no longer exists (if it ever did), and it seems quite unreal.
A is the answer since a topic sentence supports the thesis statement
Fragility and the beauty of life