Answer:
The second one: You are, if I'm not mistaken, a good person for this experiment.
Explanation:
The first sentence, "You are, if I'm not mistaken a good person, for this experiment." does not have a comma after "mistaken", where there should be one. After "a good person", there should not be a comma.
Answer:how many planets are there in our solar system
Explanation:
<span>A) a study of local economics by an objective research company
It's important that whatever information is presented, that it is objected and unbiased. A third party research company that has no stake in the building would be the most unbiased company to do the research. Also, having an economic study would present the information in the most educational way. </span>
Conciseness, objectivy and accuracy.