Count each letter in the word "TELEVISION".

• T-E-L-E-V-I-S-I-O-N
• Count: 1-T, 2-E, 3-L, 4-E, 5-V, 6-I, 7-S, 8-I, 9-O, 10-N

There are 10 letters in TELEVISION.

Final Answer: C: 10