I would say held because vague means that you aren't certain about what you're doing and the other words describe to hold onto something for dear life so I would go with held...if that's helpful to you.
For outdoor trials, these have been carried out by the Mosquito Research and Control Unit Cayman, the Gorgas Memorial Institute in Panama, the Institute for Medical Research in Malaysia, Moscamed and the University of São Paulo in Brazil. In each and everyone of the outdoor suppression trials the wild population of Aedes aegypti<span> in the areas has been decreased by over 90%.</span>
C because there’s not enough conflict in this scenario
Answer:
The answer is C. ok my love.
Explanation: