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Abibi will finish 1 minute 20 seconds sooner than Keno.

Abibi's advantage of running the first 2,000 meters 16 seconds faster than Keno translates into a significant time difference over the entire 10,000-meter race, resulting in a finish that is 1 minute 20 seconds earlier than Keno's.

A) 1 min 10 sec

This option is incorrect because it underestimates the time difference created by Abibi's faster pace over the entire race. The calculations based on their paces indicate a greater time advantage than 1 minute 10 seconds.

B) 1 min 15 sec

This option is also incorrect as it does not accurately reflect the total time difference resulting from Abibi's quicker pace. The difference calculated is greater than 1 minute 15 seconds.

C) 1 min 20 sec

This option is correct. Given that Abibi runs the first 2,000 meters 16 seconds faster, maintaining this pace for the remaining distance allows him to finish 1 minute 20 seconds ahead of Keno after completing the full 10,000 meters.

D) 1 min 25 sec

This option is incorrect because it overestimates the time difference. The calculations show that while Abibi has a significant advantage, it does not extend to 1 minute 25 seconds.

Conclusion

The correct answer, 1 minute 20 seconds, reflects Abibi's sustained advantage throughout the race due to his initial faster pace. Other options fail to account for the cumulative effect of the 16-second lead over the entire distance, solidifying option C as the definitive correct choice.