In form, style and theme, many of Carl Sandburg's poems resemble

In form, style and theme, many of Carl Sandburg's poems resemble（ ）in Walt Whitman's collection Leaves of Grass.

these

those

this

that

两者是同类比较，且为复数，用those，选B。句意：在形式、风格和主题上，卡尔·桑德堡的许多诗歌与沃尔特·惠特曼的《草叶集》相似。