Which of the Following Statements Describes the Relationship Between $\beta$ -Galactosidase And

Which of the following statements describes the relationship between $\beta$ -galactosidase and $\beta$ -thiogalactoside?

A) They are synonyms for the same molecule.
B) $\beta$ -galactosidase cleaves $\beta$ -thiogalactoside.
C) $\beta$ -galactosidase is a precursor for synthesizing $\beta$ -thiogalactoside.
D) $\beta$ -thiogalactoside is a precursor for synthesizing $\beta$ -galactosidase.
E) $\beta$ -galactosidase binds to $\beta$ -thiogalactoside but is unable to cleave it.