Amazon's ROE in 2019 was 18.67%. Why did ROE change in 2020? (NOTE: This is a multiple answers question. You will earn partial credit with a penalty unless you select ONLY the correct answers. For a detailed explanation of how this penalty is calculated, please see the instructions above)

Basic earnings per share increased from $23.46 to $42.64

The net profit margin increased from 4.13% to 5.53% in 2020, suggesting an increase in profitability

The asset turnover increased from 1.20 to 1.25 in 2020, suggesting an increase in productivity

Financial leverage decreased in 2020

The return on assets increased from 5.14% to 6.64% in 2020

The question uses Amazon's 10K from 2020