What was the percentage change in per capita CO2 emissions in Austria between 2015 and 2019? option_A: -11.2% option_B: -10.2% option_C: -1.1% option_D: 1.1% option_E: None of the above explanation: To calculate the percentage change: ((8.7 - 9.8) / 9.8) × 100 = (-1.1 / 9.8) × 100 = -11.2%. The most common error would be to use 8.7 as the initial value instead of 9.8 (wrong_column), or to calculate the absolute difference instead of the percentage change (forgot_step).