The correct answer is (a).
The total production of all types of scooters in 2017 was 2,934,000 units. In 2018, the total production was 3,042,000 units. In 2019, the total production was 3,150,000 units. In 2020, the total production was 3,258,000 units. Therefore, the total production of all types of scooters was minimum in 2017.
Option (b): In 2018, the total production of all types of scooters was 3,042,000 units. This is more than the total production in 2017.
Option (c): In 2019, the total production of all types of scooters was 3,150,000 units. This is more than the total production in 2017.
Option (d): In 2020, the total production of all types of scooters was 3,258,000 units. This is more than the total production in 2017.