Which of the Following Statements Is Correct

Which of the following statements is correct?

A) After being uploaded from the phloem,sugars are usually converted to starch or other storage carbohydrates.
B) During the Middle Ages,sugar was an expensive luxury.
C) Columbus introduced sugarcane to the Caribbean Islands,and many islands were denuded of native forests and planted with sugarcane soon afterward.
D) The growing of sugarcane was indirectly responsible for the establishment of slavery in the Americas.
E) All of the above are correct.