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C) Primary data is outdated,whereas secondary data is current and has known sources.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