Brands of athletic shoes such as Nike have very loyal segments of customers because shoes aren't just shoes; they're a means of self$-$expression. Athletic consumers purchase the shoes because they want high performance, whereas fashionistas seek attractive styles. Each segment holds certain expectations, and the shoes must meet them. This example shows that for $\_\_\_\_\_\_\_,$ the comparison process is deliberative and conscious.

a$.$ low$-$involvement purchases

b$.$ experiential purchases

c$.$ high$-$involvement purchases

d$.$ search goods