Which of the Following Is a Difference Between Primary Data

Multiple Choice

Which of the following is a difference between primary data and secondary data?

A) Primary data are inexpensive to gather, while secondary data are expensive to gather.
B) Primary data can be maintained in secrecy, while secondary data are usually available to all interested parties for relatively small fees or free.
C) Primary data are outdated, whereas secondary data are current and have known sources.
D) Primary data are data that have been previously collected, while secondary data are data that have been collected for the first time.