At the opening of the play, Tom is dressed in a merchant sailor uniform, which foreshadows Tom’s abandonment of his family. Option B is correct. In other words, it foreshadows Tom's desertion of his mother and sister.
Tom has a double role in The Glass Menagerie. He is presented as a character whose recollections the play documents and as a character who acts within those recollections and highlights the play’s tension between dramatic real facts and memory’s distortion of truth.
The right answer for the question that is being asked and shown above is that: "Tom’s abandonment of his family." At the opening of the play, Tom is dressed in a merchant sailor uniform, which foreshadows Tom’s abandonment of his family.