A school has 764 students. Of the students, 118 are in third grade. Which equation can be used to find \( s \), the total number of students in all of the other grades?
A. \( s - 764 = 118 \)
B. \( s - 118 = 764 \)
C. \( 764 + 118 = s \)
D. \( 118 + s = 764 \)