If you were assigned to write an essay about the debate over the effectiveness of vaccines, which of these sentences would display proper word choice?

A) Some wonder whether vaccines might in fact make children salacious to disease, instead of inoculating them.
B) Some wonder whether vaccines might in fact make children suspicious to disease, instead of inoculating them.
C) Some wonder whether vaccines might in fact make children sensational to disease, instead of inoculating them.
D) Some wonder whether vaccines might in fact make children susceptible to disease, instead of inoculating them.
E) Some wonder whether vaccines might in fact make children unavailable to disease, instead of inoculating them.