The downside of manufacturing Electric Vehicles (EVS) include O a. the negative environmental impact of mining the necessary minerals (cobalt and lithium) needed for EVs batteries b. the highly specialized paint required by this type of vehicle O c. cobalt, a critical component in the lithium batteries used by EVs, is mainly produced in the Republic of Congo, where there are concerns of abusive child labor practices and lack of worker protections from cobalt's toxic effects O d. both a and c