Debt To Equity Data:

2018: 0.27x

2019: 0.23x

2020: 0.21x

2021: 0.18x

2022: 0.17x

Question: which of the following transactions and events would result in a deterioration in Debt to Equity in year 2021?

1) a share buy-back

2) receiving cash for unearned sales revenue

3) the purchase of machinery financed entirely by a reducing-balance bank loan

4) A and B only

5) A and C only

6) B and C only

7) All of the above

8) None of the above