What happens after the sun goes down?
A) The level of Pfr increases.
B) The level of Pfr remains constant.
C) Pfr is converted to Pr.
D) Pfr is degraded.
E) Pr is converted to Pfr.

Question

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The Answer of What happens after the sun goes down?
A) The level of Pfr increases.
B) The level of Pfr remains constant.
C) Pfr is converted to Pr.
D) Pfr is degraded.
E) Pr is converted to Pfr.

What Happens After the Sun Goes Down