40. 請由低至高排列以下物質在水中的溶解度？
 I. CH3–CH2–CH2–CH3    II. CH3–CH2–O–CH2–CH3
III. CH3–CH2–OH              IV. CH3–OH

(A) I < III < IV < II
(B) I < II < IV < III
(C) III < IV < II < I
(D) I < II < III < IV