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>
Hes is facing external conflict
The two protagonists are there to support each other and help each one succeed. Grant's story unfolds with Jefferson. The community involved in their path towards their destination is the black community and the Reverend. Grant was guided towards reconciling his insecurities regarding his race and also reconnecting to his roots, making this the first step towards his success.
I think its A but im not 100% sure. Hope this helps :)
It would be C because a conjunction can stand alone