you have noticed extract$-$refresh failures, slow$-$runing extract refreshes, poor workbook performance, and high CPU usage during daily extract refreshes. Which intervention typically provides a remedy with the largest impact?

a$.$ use incremental extract refreshes instead of full refreshes

b$.$ increase the number of Backgrounder processes

c$.$ reduce the size of individual extracts

d$.$ move backgrounder process ot a separate node of nodes