Figuer: -In the Figure,the Researchers Measured a Clam's Ability to Burrow

Figuer:

-In the figure,the researchers measured a clam's ability to burrow as an indicator of paralysis due to inhibition of a Na⁺ transporter by saxitoxin.Which of the following would occur in sensitive clam cells that have been exposed to saxitoxin?

A) Na⁺ ions would no longer be able to leave a neuron by facilitated diffusion.
B) Na⁺ ions would no longer be able to leave a neuron by active transport.
C) Na⁺ ions would no longer be able to enter a neuron by active transport.
D) Na⁺ ions would no longer be able to enter a neuron by facilitated diffusion.
E) Na⁺ ions would no longer be used by neurons.