How did hackers compromise Mark Zuckerberg's Facebook page?

a$.$

Sent phishing emails to Mark Zuckerberg

b$.$

Exploited a vulnerability in the Facebook API to post unauthorized status updates

c$.$

Manipulated the security screening system on Facebook

d$.$

Used malware to gain access to Zuckerberg's login credentials

e$.$

Created a fake Facebook account impersonating Zuckerberg