Teacher:In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
Teacher: Now, understand the problem? Solve this instance: [header] How to become a customs inspector [title] Be a citizen and resident of the united states. [step] Before you can be eligible to work as a customs inspector in the united states, you have to be a u.s. citizen who has lived in the u.s. for at least 3 of the past 5 years. You'll also need a valid driver's license. <sep> (A) [title] Make sure you're in the right age range. [step] Us customs and border protection requires that applicants be referred for selection prior to their 40th birthdays. (B) Work as a member of the u.s. border patrol (uscis) and for tax purposes. (C) [substeps] Under the waiver act of 1965, a u.s. citizen cannot work beyond the age of 40, except for a certain years when he or she is at least 21 years old. (D) [substeps] If you're a u.s. citizen, you can't work as a customs inspector without your us citizenship, and you need a voter registration card.
Student:
A