You can choose more than one

select the reasons why a person might not say what she literally feels.

apathy
bias
kindness
laziness
politeness
social rules

Kindness politeness and social rules i believe.

I would say:
- Kindness
- Politeness

This is mainly what I think some people would do, such as I.
But then again, there are those people who would just not speak their mind out of apathy or laziness. :)

Select the word from the list that best fits the definitionstates the the universe is expanding

According to my researches, the statement   "the factual information allows you to judge how credible the analysis in the source is." is not true. a factual information does not judge any credible analysis because it shows facts that are generally known by everyone.