Asokoro office … is located in Ibadan.

Analyze the question: The sentence is "Asokoro office ................ is located in Ibadan." We need the correct form of the word "headquarters" to fill the gap.

Explain the concept:

• Headquarters is a noun that always ends in "s". It can take a singular or plural verb (e.g., "The headquarters is in Lagos" or "The headquarters are in Lagos").
• "Headquarter" on its own is not the standard noun form. It is used mainly as a verb (to be headquartered).
• A possessive apostrophe (headquarters' or headquarter's) is used only when something belongs to the headquarters, such as "the headquarters' staff."

Step-by-step solution:

1. The sentence reads: "Asokoro office headquarters is located in Ibadan." Here, "headquarters" names the main office, and "Asokoro office" works as a modifier describing which headquarters.
2. No ownership is shown after the gap, because the next word is the verb "is." So a possessive form (A or C) is not needed.
3. "Headquarter" (B) is not the standard noun form.
4. The correct form is "headquarters", used with the singular verb "is" in this sentence.

Answer: D. headquarters

Tip: "Headquarters" always keeps its "s", like "news" or "premises". Add an apostrophe only when something belongs to it, and ask yourself: "Is there a noun right after it that it owns?" If not, no apostrophe is needed.