The student wants to compare the effectiveness of the two acoustic deterrents while noting a limitation shared by both.…

The student wants to compare the effectiveness of the two acoustic deterrents while noting a limitation shared by both. Which choice most effectively uses the relevant information from the notes to accomplish this goal?

1. A.Although active pingers reduced harbor porpoise bycatch more substantially than passive reflectors did (75% versus 32%), both devices proved significantly less effective in environments with heavy shipping noise.
2. B.In field trials, active pingers that emit ultrasonic pulses reduced harbor porpoise bycatch by 75%, whereas passive acoustic reflectors achieved a 32% reduction.
3. C.While both active pingers and passive acoustic reflectors are designed to alert harbor porpoises to gillnets, both devices experience reduced efficacy in areas with high levels of shipping noise.
4. D.To address harbor porpoise bycatch, researchers tested active pingers, which emit ultrasonic signals, alongside passive reflectors, which bounce porpoises' echolocation clicks back to them.