Source materials and documents that provide original, unaltered statements or records in a variety of fields such as science, law, government, mathematics and history are commonly referred to as:
Explanation
Answer: D - Source materials and documents that provide original, unaltered statements or records in a variety of fields such as science, law, government, mathematics and history are commonly referred to as primary sources and documents. The order of sources-beginning with those closest in time, proximity and likely the reality of an event or person - is primary, secondary and tertiary.
