Answer: c) Be flexible during new situations.
Step-by-step explanation:
According to the mentioned situation in question, Hailey should persist flexibility in the in her future plans and situation so that she does not face stress and difficulty in handling the plans.If she stays stiff and constant for only prepared situations then it will create issues for her if the change in situation occurs.Thus, flexibility in future situations should present in Hailey.
Other options are incorrect because guest list , neglecting commitments and opting representatives for the responsibilities are not the correct steps for planning the future situation. These all factors are required along with flexibility characteristic as it will helps the most. Thus,the correct option is option (c).