Final answer:
The pH range that indicates a strong base is D. 11.2-12.0, which is highly alkaline and capable of producing a large amount of hydroxide ions.
Step-by-step explanation:
The pH range that represents a strong base is D. 11.2-12.0. The pH scale measures how acidic or basic a solution is, with 7 being neutral. Any pH below 7 indicates an acid, while pH above 7 indicates a base. A strong base has a high pH and can produce a large amount of hydroxide ions (OH-). The given options A (1.3-2.0) and B (4.5-5.2) indicate acidic solutions and C (7.1-9.0) could represent a weak base or neutral solution. On the other hand, option D is indicative of a strong base that is highly alkaline.