Which of the Following Services Offered by Investment Firms Have

Which of the following services offered by investment firms have some states declared to be incompatible with generating forecasts of company earnings?
1) Assisting a firm in an initial public offering in determining a preliminary offering price.
2) Assisting a firm in an initial public offering in determining the number of shares to be sold.
3) Agreeing to buy the entire issue of stock in an initial public offering and reselling the stock to investors.
4) Agreeing to put forth the firm's best effort to sell the entire issue of stock in an initial public offering.

A) Only 3
B) Only 4
C) 3 and 4
D) 1,2,3,and 4