What objection did the kangaroo havein taking the duck all around the world on his tail? How did the duck solve this?

The Kangaroo raised an objection that the feet of Duck are unpleasantly wet and cold. Her feet might give him 'roo-Matiz' (rheumatic fever). The Duck replied that she has bought four pairs of socks to cover her feet and a cloak to cover her body in order to avert cold. In this manner, the Duck solved the problem