- A5
- B6
- C8
- D7
Step-by-Step Solution
Track 15 September: 2011 Thu, then 2012 Sat (leap, +2), 2013 Sun, 2014 Mon, 2015 Tue, 2016 Thu, 2017 Fri, 2018 Sat, 2019 Sun, 2020 Tue, 2021 Wed, 2022 Thu, 2023 Fri, 2024 Sun, 2025 Mon, 2026 Tue, 2027 Wed, 2028 Fri, 2029 Sat, 2030 Sun. Weekends: 2012, 2013, 2018, 2019, 2024, 2029, 2030 = 7.
Answer: D) 7