Multiple choice

adj. to be vulnerable (to something)

  1. substantiate

  2. static

  3. susceptible

  4. spur

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

"Susceptible" means likely or liable to be influenced or harmed by a particular thing, making one vulnerable. "Static" means lacking in movement or change, and "substantiate" is a verb meaning to provide evidence.