Bias, according to Google, is an inclination or prejudice for or against one person or group, especially in a way considered to be unfair.
A is a biased statement.
A. In my community, education is most important to the Asian population, and reduced library hours would be seriously inconvenient.
This statement reflects a prejudice towards the Asian population. The prejudice is that the Asian population value education more than the rest of the community.
Statements, B, C, and D state objective facts.