What would happen if the secondary messenger cGMP was blocked in ...

[xclash]

What would happen if the secondary messenger cGMP was blocked in the de-etiolation pathway?
A) Specific protein kinase 1 would be activated, and greening would occur.
B) Ca2+ channels would not open, and no greening would occur.
C) Ca2+ channels could open, and specific protein kinase 2 could still be produced.
D) No transcription of genes that function in de-etiolation would occur.
E) Transcription of de-etiolation genes in the nucleus would not be affected.

[clippers!]

I chose C and got the answer, hope that helps.