The consonant C can sometimes be pronounced “S” as in “since” but here we are looking at the hard, plosive, unvoiced “K” sound indicated by both the letters C and K. So that’s “K” as in “can”. And we are also looking at its voiced equivalent “G” as in “get”.

Compare the two sounds:

K/G K/G K/G

The “K” sound with all the vowels.