Answer:
a. frictional unemployment will cause workers to extend their temporary lay-offs.
Step-by-step explanation:
Remember, frictional unemployment is a type of unemployment that is self-inflicted by workers who want to change jobs (sectorial shifting) within the same economy; thus, they quit their present job in search of a new one.
However, due to uncontrolled circumstances, they may extend their temporary layoffs or period of unemployment, making them become frictionally unemployed.