GMAT Sentence Correction 101: Back to the Basics!
Most efforts to combat such mosquito-borne diseaseslike malaria and dengue have focused either on the vaccination of humans or on exterminating mosquitoes with pesticides.
A like malaria and dengue have focused either on the vaccination of humans or on exterminating
B like malaria and dengue have focused either on vaccinating of humans or on the extermination of
C as malaria and dengue have focused on either vaccinating humans or on exterminating
...
.jpg)
