Read the following poem then answer the adjoining questions. "A Birthday" by Christina Rossetti

My heart is like a singing bird Whose nest is a weathered shoot:

My heart is like an apple-tree Whose boughs are bent with thick-set fruit;

My heart is like a rainbow shell That paddles in a halcyon [peaceful sea;

My heart is gladder than all these Because my love is come to me.

Which line from the poem most likely reveals the author's message?

A. My heart is like a rainbow shell.

B. My heart is like a singing bird.

C. Because my love is come to me.