Which dialect group, forming the basis of the modern standard literary language, is spoken in the central region around the capital and is characterised by akanye vowel reduction?

• A Northern dialects
• B Southern dialects
• C Pomeranian dialects
• D Central dialects ✓

The transition zone between the northern (okanye) and southern (akanye) dialect areas provided the compromise speech that evolved into the standard literary norm in the 18th–19th centuries.