CFA Mock Exam - Ouch.. offering, question, across, reduce, should

RoastBeef

In question 42:

How can "B" not be the cheapest collar? You're offering to take a loan at 6.5% and give it at 4.0%. Widest range so it has to be the cheapest!! Why is "B" incorrect?

In question 46:

Again "B" diversifying across currencies should reduce risk? Why does the CFA not agree? (Those bastards, ha ha).

Got a 65% btw: boo @#$%& hoo!