How Do Scientists Use Lake Sediments to Study Past Climates

How do scientists use lake sediments to study past climates?

A) Isotopic analysis of the relative proportions of 18O to 16O enable determination of evaporation rates from ancient lakes.
B) Lake sediments contain organic materials that can be identified and radiocarbon dated,giving insight into past plant communities and climatic conditions.
C) During warmer conditions,lake sediments form wider rings,whereas in cooler conditions,these rings are narrower.
D) The amount and type of pollen in lake sediments is an indication of the macrovertebrate assemblages that dominated an area.
E) Lake sediment analysis is used to determine which fish species have persisted in a particular lake over long periods of time.

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