Answer:
B. data breach.
Step-by-step explanation:
A data breach is an act of stealing, viewing, copying, and transmitting data that belongs to an individual or organization, and is private, sensitive, confidential, and protected , by an individual or an organization.
Data le_ak and unintended data disclosure are also data breaches. Data breachs can happen after cy_ber attacks and ha_cking of systems.
In 2016 Yahoo servers were hac_ked into and user names, email ids, passwords etc, were stolen.
Cyber terr_orism involves politically motivated destruction or obstruction of data and services.
Targeted ad campaign may involve flooding of a user account with advertising information through e-mails or messages etc.