Please explain to me

Alpha increased its gearing from last year, if the average rate of interest paid on its liabilities is 4.3% (slightly less than profit generated per dollar of asset), then what effect did this have on its return on equity (ROE) for the year? Select one: 0 a. An improvement in the ROE O b. A worsening of the ROE O 0. Neither a favourable or unfavourable effect 0 d. Cannot be determined