Van den Boom Mandacturing provides the following information:

$\backslash$table$[[,2000,2000],[$Units produced,$2,000,4,000],[$Materials used $($ps$),200,500],[$Labor used $($fri$),2,000,2,500]]$

Which of the following correctly describes the change in probluctive efficiency from $201$ to $202?$

a$.$ Matertal and laber productivity both decreased.

b$.$ Material and labor productivity both increased.

c$.$ Material productivity increased and labor productivity decreased.

d$.$ Material productivity decreased and labor productivity increased.