Nhận biết (M1)

Emulsifiers, which turn up in products from food to cleaners, are compounds that hold an emulsion together— an emulsion being two or more liquids mixed together that would not otherwise blend easily. Emulsifiers of the sort ______ reach for, oleic acid among them, let these scientists work oil together with water into homogeneous formulations, lotions and perfumes among them.

Which choice completes the text so that it conforms to the conventions of Standard English?

• A.

  cosmetic chemists,

• B.

  cosmetic chemist’s,

• C.

  cosmetic’s chemists,

• D.

  cosmetic chemists’,