Final answer:
The oldest a student can be to enroll in Parent Taught Driver Education (PTDE) is 25 years old. PTDE programs are state-specific and allow parents to teach driving to their children under the set age limit.
Step-by-step explanation:
The oldest a student can be to be allowed to take Parent Taught Driver Education (PTDE) is 25 years old. Option D is the correct answer. PTDE programs are designed to allow parents to legally teach their children how to drive. The specifics of the program, including age limits, can vary by state. However, in general, anyone under the age of 25 can participate in PTDE, as it provides a structured guide for parents to instruct their teenagers and young adults.