Hello, can i have some help with this please. Thank you

A PO: Select one: O a. only occurs when a company goes public for the first time O b. can occur even if the company is already a public company Oc. is a method of investing in the preferred stock offerings of another company O d. is a Geek letter organization at SUNY O e. is a method of reducing the amount owed on bonds through a sinking fund