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 rairbow shell That paddles in a halcyon [peaceful sea

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

Which two specific lines from the poem help the reader to determine the mood?

A. Because my love has come to me.

B. My heart is like a rainbow shell.

C. My heart is gladder than all of these.