What is the name of the extinct language spoken by the Coahuiltecan peoples of northeast Mexico and southern Texas, known almost entirely from a single 1760 manual of Christian prayers and catechism?

• A Karankawa
• B Tonkawa
• C Comecrudo ✓
• D Atakapa

Comecrudo (also called Carrizo) is preserved almost exclusively in a missionary manuscript, representing one of the least-documented language families of the Americas.