What Would Happen to G Protein-Coupled Metabotropic Signaling in a Cell

Multiple Choice

What would happen to G protein-coupled metabotropic signaling in a cell if you removed GTP from the cell cytoplasm?

A) This would enhance G protein-coupled metabotropic receptor signaling.
B) This would make G protein-coupled metabotropic receptor signaling irreversible.
C) This would not affect G protein-coupled metabotropic receptor signaling.
D) This would block G protein-coupled metabotropic receptor signaling.
E) This would cause G protein-coupled metabotropic receptors to switch to a different signaling pathway.