As Conjugation Increases Across a Series of Molecules, Which of the Following

As conjugation increases across a series of molecules, which of the following statements is true?
I. The HOMO-LUMO gap becomes smaller.
II. The number of possible UV transitions increases.
III. Molecules absorb light at shorter wavelengths.
IV. Molecules absorb light of higher energy.

A) I
B) I, II
C) I, III
D) I, II, IV
E) I, II, III, IV