Answer: The products are sodium acetate
and solid silver chloride 
Explanation:
A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.
The reaction of aqueous solutions of sodium chloride and silver (I) acetate is :

Thus the products are aqueous sodium acetate
and solid silver chloride 
Usually the controlled experiment is the one that is not tested so they look at the experimental experiment to find the differences. Sorry if this doesn't answer your question.
Answer:
A
Explanation:
Wearing sunglasses is not a response to an internal stimuli. It is a voluntary action instead of an involuntary one.
Answer:
Acidic
Explanation:
Please kindly check attachment for the detailed step by step solution of the given problem.
Answer:
I think is D) to produce involuntary internal movements.
Explanation: