4. Read the following poem: "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. What tone do the details of the poem convey? A. Excitement C. Sorrow B. Happiness D. Turmoil​