Which of the following scenarios is an example of implementation lag?

A. the federal government receives new data that shows economic slowdown however economists suspect that a recession has been occurring for eight months.

B. the federal government introduces a new economic stimulus bill and Parliament takes six months to approve it.

C. the federal government would like to introduce a new economic stimulus bill. It will take two years to plan and complete.

D. quarterly data is showing positive growth however the economy enters a deep recession