C. Leave out personal opinion
Bias does not give helpful information; facts and true problems with a work are what help people
Investigations or experiments help to build scientific knowledge through the findings that these experiments or investigations help to build. The body of knowledge is created through the work of numerous individual and team scientific investigations and experiments into unknown phenomenon. This work culminates in helping to build scientific knowledge.
The answer is b) the federal government's assumption of state debt
Greek Mythology, hope this helps!