​In a coin toss bet,where both heads and tails are equally likely,you win a dollar on heads but lose a dollar on tails.The expected value of the bet is

A) ​$0.50
B) -$0.50
C) $1.00
D) ​$0.00

The sustainable growth rate is equal to:

A) the retention ratio multiplied by ROE.
B) the dividend payout ratio multiplied by ROA.
C) the dividend payout ratio multiplied by ROE.
D) the retention ratio multiplied by ROA.