【单选题】

According to the passage, extending solar record is important for which of the following reasons
A．(A) It would determine the extent to which sunspots plays a role in increasing the sun's irradiance.

B．(B) It would help establish whether the data supporting the existence of the Maunder Minimum is reliable.
C．(C) It would allow scientists to establish whether the warming trends owe to industrialization or to natural factors existing prior to industrialization.
D．(D) It could possibly corroborate the information on sunspots provided by satellites.
E．(E) It would establish that sunspots do indeed appear in regular and periodic cycles.