Which 2010–2021 animated educational series about tiny repairmen living inside household appliances, explaining scientific principles to children, became a global success distributed in over 80 countries?

• A The Fixies ✓
• B Luntik
• C Three Cats
• D Masha's Tales

'The Fixies' (Фиксики) was based on Eduard Uspensky's story 'Guarantee Men' and teaches physics, chemistry, and engineering through the adventures of tiny creatures who fix malfunctioning gadgets.