Choose the correct one.
Correct answer: A. If fertility declines fast enough the line will level off sometime after the middle of the twenty-first century.
- A. If fertility declines fast enough the line will level off sometime after the middle of the twenty-first century.
- B. If fertility declines enough fast the line will level off sometime after the middle of the twenty-first century.
- C. If fertility declines fast enough the line will level off sometimes after the middle of the twenty-first century.
- D. If fertility decline fast enough the line will level off sometime after the middle of the twenty-first century.
Explanation
The correct answer is A. If fertility declines fast enough the line will level off sometime after the middle of the twenty-first century.- The sentence is structured correctly, with a conditional clause ("If fertility declines fast enough") followed by a main clause ("the line will level off...").- The adverb "fast enough" is correctly placed to modify the verb "declines".- The verb tense is consistent, with "declines" and "will level off" both in the future tense.
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