Evaluate the following expression:
[10 x 2 + (30 - 15)] : 7 + 3 x 8
a. 35
b. 23
C. 39
d. 29
[10 x 2 + (30 - 15)] : 7 + 3 x 8
a. 35
b. 23
C. 39
d. 29