Congo, Democratic Republic of the: 18 years of age; universal and compulsory
Congo, Republic of the:
18 years of age; universal
Cook Islands:
NA years of age; universal adult
Costa Rica:
18 years of age; universal and compulsory
Cote d'Ivoire:
18 years of age; universal
Croatia:
18 years of age; universal (16 years of age, if employed)
Cuba:
16 years of age; universal
Cyprus:
18 years of age; universal
Czech Republic:
18 years of age; universal
Denmark:
18 years of age; universal