Can't answer without the text.
Scientists should definitely use evidence - and they collect this evidence though especially designed experiments. Based on their data and assumptions they build models which they then test, but they can base their conclusions based on the models too.
What they should not do is based the conclusions on opinions, because opinions are not imparcial- they can state them as opinions, but not as conclusions.
<span />
Siegfried and Roy have been friends for many years, but in the past few months, they seem to have less in common, and Roy has been thinking more about hanging out with a potential new friend means that Siegfried and Roy appear to be in the deterioration stage of friendship development. The bond that Siegfried-Roy relationship once had weakens, because of the individuals (or both of them) has changed.
Answer:
The correct answer is letter A. My friend, Greg, likes to bake cookies for the people in the office.
Explanation:
What we have in this sentence is an appositive, a word or phrase immediately following and renaming another word or phase. Our appositive here is "Greg", which is renaming the noun "friend". Since "Greg" is only giving additional but not essential information, it could easily be removed from the sentence. Notice how the sentence would still make sense: " My friend likes to bake cookies for the people in the office." Since this appositive is not a restrictive one, it should be framed by commas. That is why the best option is letter A.
Answer:
A. is the largest plain in the world is the correct answer.
Explanation: