Multiple Choice
Which of the following is true?
A) Practical technology for the use of solar energy has not yet been developed.
B) Solar-thermal electrical production is only at the experimental stage.
C) Flat-plate solar collectors were sold in newspapers and merchandise catalogs almost 100 years ago.
D) Solar energy is nonrenewable, and the technology associated with its use is highly centralized and expensive.
Correct Answer:

Verified
Correct Answer:
Verified
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