Question

A regional variant of a standard language is a called a(n)
Select one:
a. dialect.
b. isogloss.
c. creole.
d. lingua franca.
e. pidgin.

Answer 1

I'd say it's a dialect.
Isogloss is a boundary, creole is a certain group, lingua franca is like a common language in an area. And a pidgin is simplified language.

Like in other countries, they speak the same language but the dialects are different in different regions.
Hope this helps!