A research team aims to investigate the long-term effects of a specific early childhood reading program on adult career success. They enroll a group of 5-year-old participants, track them for 30 years, and collect data on their careers at age 35. What is the most significant advantage of this research design for their study?

A team of researchers wants to study how problem-solving skills change from early adulthood to late adulthood. They are concerned that comparing a group of 20-year-olds to a group of 70-year-olds at the same time might be misleading, because the two groups have had vastly different life experiences, such as access to technology and educational opportunities. Which statement best explains why a longitudinal design is the most suitable approach to address the researchers' specific concern?