Which of the following is an example of a technological solution to water pollution in a local pond?

Sure: ths is called protyping and lets yu get a sende fo the effeciveness tof the cahnge and the cost of the change. 

A - just like the scientific principle syu what to know what other know or have learned. Example would it be silly to build a nuclear power de-salinatiztion plant when a dam in the mountains wuld dothe savme thng and perhaps have the advatage of using local labor and preveinting floods and givng of hydro eletic power. 

A a process is a technological soultion it uses tools, machines, chemical to effect an otu come.

Is it b the answer and yes

10 neutrons is the answer