Marissa has heard her brother say that girls aren't very good at riding bikes. she doesn't try very hard to learn to ride her bike because she has heard other people say the same thing as her brother. marissa is showing signs of

stereotype vulnerability

Explanation:

Stereotype Vulnerability refers to the tendency of the people to get influenced by the negative stereotype about their social position or category such as sexual orientation, political affiliation, ethnicity, nationality, age, etc. It is a risk of conforming to a stereotype by perceiving it as real. As per the question, Marissa is confirming the stereotype she heard from her brother and other people that girls are not good at driving, this is an example of gender stereotype vulnerability.

sumerians were polytheistic, meaning they believed in many different gods. so, the best answer is c.