As CEO, these thefts occurred during my tenure, and I want to sincerely apologize to each and every one of our users, unfortunately, while all our measures helped Yahoo successfully defend against the barrage of attacks by both private and state-sponsored hackers, Russian agents intruded on our systems and stole our users’ data.

Who said: "Let us not seek the Republican answer or the Democratic answer, but the right answer. Let us not seek to fix the blame for the past. Let us accept our own responsibility for the future."?

• A. John F. Kennedy
• B. Jimmy Carter
• C. Lyndon B. Johnson
• D. Gerald Ford