Explaining the Need for References

Why might a pharmacy library keep specific pharmacy references such as King Guide to Parenteral Admixtures or Trissel's Stability of Compounded Formulations?
Check all that apply.

a. Pharmacies are required to keep them by law in some states.
b. The references provide relevant information.
c. Pharmacies are required to keep them by federal law.
d. The pharmacy performs tasks described in the references.
e. Pharmacy staff may want to use the references.