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Verbal·Expression of Ideas·Rhetorical Synthesis

hard

While researching a topic, a student has taken the following notes:

• Dendrochronology uses the annual growth rings of long-lived trees to construct multi-millennial climate chronologies.
• Bristlecone pines (Pinus longaeva) in California’s White Mountains can live for over 4,800 years.
• Sub-fossilized bog oaks in Ireland and Germany provide overlapping tree-ring sequences spanning over 10,000 years.
• Dendrochronological calibration revealed that raw radiocarbon (${}^{14}\mathrm{C}$) dating systematically underestimated archaeological ages due to past fluctuations in atmospheric carbon-14 concentrations.
• Tree-ring calibration curves (such as IntCal20) are now indispensable for establishing accurate absolute dates in archaeology.

The student wants to explain how dendrochronology improved the precision of radiocarbon dating. Which choice most effectively uses relevant information from the notes to accomplish this goal?

A

By providing continuous multi-millennial tree-ring sequences, dendrochronology enabled researchers to calibrate radiocarbon dates and correct for historical fluctuations in atmospheric ${}^{14}\mathrm{C}$ levels.

B

Bristlecone pines in California can live for over 4,800 years, making them among the oldest living individual organisms on Earth.

C

Radiocarbon dating systematically underestimated the ages of ancient archaeological artifacts found in Ireland and Germany.

D

Tree-ring sequences from bog oaks and bristlecone pines have allowed scientists to construct climate chronologies spanning over 10,000 years.