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 (1) a polar stationary phase and a less polar mobile phase are used.

(2) a nonpolar or weakly polar stationary phase and a more polar mobile phase are used.

(3) a less polar mobile phase is a stronger mobile phase.

(4) increasing the polarity of the mobile phase increasing the elution time of the less polar analyte

(5) the least polar component is eluted first because it is the most soluble in the mobile phase

Your answer:
(A) (2), (3) and (4)；
(B) (1), (3) and (4)；
(C) (2) and (4)；
(D)(3) and (5)；
(E) (2), (4) and (5).