In Order for the Government Contractor Defense to Apply,the Following

In order for the government contractor defense to apply,the following must be present except:

A) the government set precise specifications for the product
B) the product conformed to the government specification
C) the contractor warned the government of any known defects or dangers
D) the contractor presented the government with a proposed safer design for the product
E) all four of the above must be proven in order for the defense to apply