This story book is _____attractive than the one on the shelfa.little b.a little c.much d.less

This story book is _____attractive than the one on the shelf
a.little b.a little c.much d.less

d
因为有than,所以要有比较的词出现,只有less是比较级.
句子的意思是：这本故事书不如架子上的那本吸引人.