The Pit Viper Bothrops Jararaca Makes a Venom That Was

The pit viper Bothrops jararaca makes a venom that was used as an arrowhead poison by indigenous tribes of Brazil. This venom inhibits the enzyme necessary to activate angiotensin. Angiotensin is a naturally occurring peptide hormone that causes vasoconstriction and thirst. Why would a molecule that inhibits the activation of a natural vasoconstrictor be poisonous?

A) An inhibitor of angiotensin may cause a fatal drop in blood pressure.
B) An inhibitor of angiotensin may allow blood pressure to rise too high, causing stroke.
C) An inhibitor of angiotensin may prevent adrenaline surges.
D) An inhibitor of angiotensin may paralyze prey.
E) An inhibitor of angiotensin may stimulate the parasympathetic nervous system.