A CPA firm needs to ensure walk$-$in clients are cordially greeted upon arrival and have their tax

information quickly screened. The task is assigned to a group of $10$ junior accountants who are

all jointly responsible for the work. Which of the following organizational phenomena likely

explains the result that none of the junior accountants actually perform the assigned task?

a$.$ Groupthink.

b$.$ Conformity.

c$.$ Diffusion of responsibility.

d$.$ The paradox of responsible behavior.