If It Is Not Clear Who the Actual Manufacturer of a Product

If it is not clear who the actual manufacturer of a product is, plaintiffs:

A) may not sue more than one manufacturer of a defective product
B) may sue any or all of the manufacturers of a defective product
C) may sue more than one manufacturer if the injury from the defective product prevents the plaintiff from being able to "engage in normal activity"
D) may sue up to three, but not more than three, manufacturers of a defective product
E) none of the choices are correct