"when can a policyowner make a change in the policy's coverage or other benefits if an irrevocable beneficiary has been named? "

Policy owner make a change after the irrevocable beneficiary dies

Explanation:

solution

Policy owner can not policy's coverage or any other benefits unless the beneficiary provides written consent for change or beneficiary dies

and if irrevocable beneficiary has name then owner can not change to policy without consent of beneficiary

so that

Policy owner make a change after the irrevocable beneficiary dies

answer; i believe the correct answer is (a) the correlation between the cause variable and outcome variable is zero;

answer; /// i believe the correct answer is (wine) ; /// good luck