Al resolver la operación 2 minus open square brackets 3 over 4 minus 1 plus 2 over 5 bullet open parentheses negative 10 plus 15 over 4 close parentheses minus 1 close square brackets , el resultado es:
A. Negative 13 over 15
B. Negative 21 over 2
C. 23 over 4
D. 21 over 4