A data scientist who works for a large company is harvesting data from a new social media website. In relation to this task, she states, Because the data are text (i.e., words), we are having trouble cleaning it. This statement relates to the _______ portion of the ETL process and reflects a concern about ________ of the data.

A. Load, process used to produce the data

B. Transform, source

C. Extract, nature

D. Transform, nature