Which of the following transactions and events would result in an improvement in Return on Equity in year 2020?

2019 - 23.31%

2020 -19.33%

a. the receipt of cash for dividends from other entities

b. the recognition of income tax expense owing at the end of the period

c.a share buy-back

d. A and B only

e. A and C only

f. B and C only

g. All of the above

h. None of the above