What does it mean to say that sugars are hygroscopic? Which of the common sugars is most hygroscopic? Provide an example of when using a highly hygroscopic sweetener is desirable; provide an example...

What does it mean to say that sugars are hygroscopic? Which of the common sugars is most hygroscopic?

Provide an example of when using a highly hygroscopic sweetener is desirable; provide an example of when using a highly hygroscopic sweetener is undesirable.