Consider the following two statements : (a) Data scrubling is a process to upgrade the quality of data, before it is moved into Data warehouse. (b) Data scrubling is a process of rejecting data from data warehouse to create indexes. Which one of the following options is correct ? (A) (a) is true, (b) is false (B) (a) is false, (b) is true (C) Both (a) and (b) are false (D) Both (a) and (b) are true