Sentence improvement (partitive construction with a superlative): verify number agreement in “one of the most …” pattern Original sentence: "This is one of the most important inventions of this century." Choose the option that best maintains correct grammar and usage.

Given data

• Structure: “one of the most + plural noun + of + singular time-period”.

Concept/Approach
After “one of the most…”, the head noun must be plural (inventions). The prepositional phrase “of this century” is correct because century refers to a single time period.

Option analysis
No correction required — original uses the standard pattern “one of the most important inventions of this century.” ✅invention of this century — singular noun after “one of the most” is incorrect.invention of these century — wrong demonstrative and number mismatch.invention of centuries / of the centuries — illogical scope and wrong number.

Final Answer
No correction required