Unlike Acetic Acid (CH₂COOH), Which Is Completely Soluble in Water

Unlike acetic acid (CH₂COOH) , which is completely soluble in water, 1-hexanoic acid (CH₂CH₂CH₂CH₂CH₂COOH) is only slightly soluble in water because

A) only acetic acid forms hydrogen bonds.
B) acetic acid has a higher boiling point than 1-hexanoic acid.
C) the increased length of carbon chain in 1-hexanoic acid increases its hydrophobic character.
D) acetic acid does not ionize in water.