Answer:
There are many groups of audience but I will base this off age.
I think the hardest group to convince are seniors.
Step-by-step explanation:
Long after 1834 (the first electric car), gasoline fueled cars were introduced in 1876. Since most of them are probably used to having to be surrounded or using gasoline-fueled cars, it might be difficult to convince them the switch. (Dates are verified by government ran websites)