It can be inferred from the passage that the satellite data scientists have collected over the past few decades

A． provides more accurate records of changes in the earth's surface climate than previously existed
B． have begun to conclusively establish a decline in the number of sunspots over the past two solar cycles
C． are plagued with too many problems to conclusively establish them as more accurate than older historical records
D． are a conclusive indicator of the effect of solar maxima on the earth's pre- industrial climate
E． have been employed by scientists seeking to argue that the number of sunspots during solar minima are on the increase