Which entity exercises control over provincial jails?

The provincial government exercises control over provincial jails, making it the correct choice. This control is part of the overall structure of local governance, where provincial jails are typically under the jurisdiction of the respective provincial authorities. This arrangement allows for the administration of jails to align with local policies, regulations, and funding, thus tailoring the management to the specific needs of the community served by the provincial jail.

The Bureau of Jail Management and Penology (BJMP), while related to jails, is specifically focused on the management of city and municipal jails rather than provincial jails. The Bureau of Corrections primarily oversees national penitentiaries and correctional facilities for more serious offenses, which makes it distinct from the responsibilities of provincial governments. The Parole and Probation Administration deals with rehabilitation and supervision of offenders after they have served their time, but it does not have control over the operation of jails. Therefore, the authority of the provincial government distinctly aligns with the oversight and operations of provincial jails.