It may be reasonably inferred from the passage that for those studying ancient pyramids:
A. Radiocarbon dating is a relatively simple method to find an exact date of construction.
B. Analyzing the chemical composition of a building material allows scientists to recreate the material being evaluated.
C. There is typically a very large gap between the conclusions of scientific researchers and those of archaeologists.
D. When conclusive facts are not available, researchers must sometimes speculate about the nature of certain findings.