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Yes. Cane sugar (sucrose) should be easily digestible as it is composed of 50% glucose and 50% fructose. The glucose aids digestion of the fructose. As always, other factors beyond your fructose malabsorption may influence your ability to digest sucrose.

Yes, although diets very high in high fructose cornsyrup has been linked to liver disease and should not be consumed by people with fructose intolerance and in only exceedingly small amounts by people with fructose malabsorption. Since many people with fructose malabsorption who become lactose intolerant can have Celiacs disease, I thought that tidbit was worth mentioning XD.

hmmm?? try researching about fructose malabsorption or fructose intolerance..

Yes, malabsorption disease might be temporary if caused by a toxin from the environment.