A study in the 1960s followed up in their adult life 800 children who had achieved in psychometric tests of ability scores in the top 1 per cent for their age group. It was reported that 90 per cent of this population had entered university and that 70 per cent had graduated. The study found that the group of adults between them had written 70 books and almost 1,000 scientific papers. Some, however, had served prison sentences, while others reported unhappy careers and marriages. A second study followed up on very low scoring children. It was found that most when retested as adults obtained scores that were average. A far lower percentage of the low scoring children had gone to university and more reported unhappy careers. The rate for criminal conviction and the incidence of adult mental health problems were reported to be broadly similar across the two groups.

Question: Most of the differences between these groups in terms of performance in the test and success in work as adults can be attributed to the amount and quality of education received.
Options:
A. true, B. false, C. uncertain
Answer: "C"