The relative pronoun which in the fragment of the text “which include banks, insurance companies, pension funds, organized exchanges, and the many ...

The relative pronoun which in the fragment of the text “which include banks, insurance companies, pension funds, organized exchanges, and the many other companies” (lines 24-26) refers to


a) financial institutions (line 24)
b) other companies (lines 25-26)
c) purposes (line 21)
d) return (line 22)
e) products and services (lines 23-24)