I am assuming that this question is wanting the number of times a clock will strike from 1 AM to 12 Noon. When a traditional clock reads 1 o'clock, it will strike once. When it reads 2 o'clock, it will strike twice. The pattern continues until 12 o'clock when the clock strikes twelve times. How many times will the clock strike from 1 AM to 12 Noon? The answer is the sum of all the hours from 1 to 12.
1+2+3+4+5+6+7+8+9+10+11+12 = 78
The clock will strike 78 times. Answer choice C).