You find out that your friend purchased $20,000 of UZL stock on margin using only $6000 of his own.He tells you that he's a genius because he'll double his money if UZL goes up 20% but he'll only lose as 20% if UZL goes down 50%.Knowing that the maintenance margin on his account is 25%, explain to your simple-minded friend what will really happen in each scenario.

A)He's a genius, he's right! I wish I'd made the same trade!

B)He will actually earn a return of 166% if the stock increases 20% and will lose 33% if the stock falls 20%

C)He will actually earn a return of 66% if the stock increases 20% and will have margin calls totaling $2K if the stock declines 20%

D)He will actually earn a return of 66% if the stock increases 20% and will lose 133% if the stock falls 20%

E)He will actually earn a return of 66% if the stock increases 20% and will have margin calls totaling $6K if the stock declines 20%

can you plz explain how this is the right answer? thanks