How does drawing conclusions from data differ from analyzing other kinds of sources

The correct answer is letter "D": Data are largely objective.

Explanation:

While conducting researches, information must be analyzed so conclusions can be drawn determining if the study confirms or not the ideas the researcher had before the investigation. Relying on data provides objectivity. Whether it is data obtained directly from the researcher or gathered using secondary resources such as statistics, books, reports or other researches.  

Word-of-mouth resources remain subjective for this purpose and should be avoided, otherwise, the conclusions could be biased or inaccurate.

for this case we have the following equation:

we apply distributive property to the terms within parentheses.

subtracting 2 on both sides of the equation: