Which of the following words is the most concrete?

When we try to establish connections or relationships between new incoming sounds and ones with which we are already familiar, we are applying auditory

a. discrimination. b. association. c. selection. d. interpretation.

Several European nations have banned what piece of clothing because there is an assumption that it symbolizes a particular political ideology or radical activism

a. hijab b. tattoos c. badges d. jeans e. All of the above