When Ben applied for life insurance, he was asked on the application if he smoked or used tobacco products. Ben answered "No." In reality, Ben smokes two packs of cigarettes a day. The policy was issued at the "preferred, nonsmoker rate." If Ben dies 6 months after the policy is issued, upon what grounds will the insurer be able to legally deny the claim?
A) warranty
B) misrepresentation
C) waiver
D) concealment