The answer is B.allusion you can know by "<span>My sap will never stir for sun or rain."</span>
D, it relates a universal idea about life.
The correct answer is letter (B)The <span>laburnum’s</span> (trembling) branches can hardly bear the burden of the beauty of “the honey-sweet and honey-colored blossoms of a laburnum” (6–7), the subject to which <span>“theirs” refers.</span>
