$($i$)$ A search engine developer was researching whether consumers care for search results that are fewer in number or are very many. Relying on the Kano method, the research team asked two questions:

$$ Functional form: $$How do you feel about search results that are numerous?$$

$$ Dysfunction form: $$How do you feel about search results that are few in number?$$

Consumers responded that they $$like it that way$$ to the functional form of the question. They said they could $$live with it that way$$ to the dysfunction form. Based on these results, how would you classify the attribute $$number of search results$?($Check one$)$

$\_\_\_($a$)$ Must$-$be $\_\_\_($b$)$ Linear satisfier $\_\_\_($c$)$ Delighter $\_\_\_($d$)$ Indifferent