Final answer:
Jennifer's waiting for Derek and plans to order for him, implying he's expected but absent, leading to the inference Derek is missing dinner.
Step-by-step explanation:
From Jennifer's statement, it can be inferred that she is currently alone but expecting Derek to join her, as she mentions that she will order for him, indicating that Derek has not yet arrived but is anticipated. Additionally, there's an implication that Jennifer is used to having company during meals, which may suggest she does not prefer dining alone. The most accurate inference from the options provided is b) Derek is missing dinner.