Answer: The correct option is (C) 26.
Step-by-step explanation: We are given to perform the indicated operation :
\(E=15-(-11).\)
We will be using the following rule of addition and subtraction :
\(a-(-b)=a+b.\)
Therefore, we get
\(E=15-(-11)=15+11=26.\)
Thus, the required value of the given expression is 26.
Option (C) is CORRECT.