How is C pronounced in Classical Latin?
In Classical Latin, "c" was always pronounced as "k". Since Renaissance Latin grammar reform, the correct pronunciation of "c" before "e" or "i" was codified to [ts].
How is AE pronounced in Latin?
In Classical Latin, <ae> would be pronounced /ai/ (like 'eye'). This diphthong eventually became the monophthong /e/ (as in 'tray').