For well control, the American Petroleum Institute recommends that hydraulic units have sufficient horsepower to close the annular preventer in __________.

Correct Answer: Option B — 30 seconds

API RP 53 standards mandate that blowout preventer (BOP) control systems must have sufficient hydraulic capacity to close the annular preventer within 30 seconds. This rapid response time is essential for well control, minimizing the volume of influx and preventing a potential blowout during drilling operations.