Use "c.a." in a sentence

1. Cables Electricos Ecuatorianos Cablec C.A

2. Triplaris moyobambensis Brandbyge Triplaris peruviana Fisch. & Meyer ex C.A. Meyer Triplaris punctata Standl.

3. C.A. - Respiratory Nose-Only Device and System for Laboratory Animals Josée Guenette, Professional Engineer, Inhalation Toxicology and Aerobiology Section, HECSB 1.