To find an expression that represents the total cost of the shirt including a 5% sales tax, we start with the original price of the shirt, which is \( d \) dollars.
The sales tax is 5% of \( d \), which can be calculated as \( 0.05d \). Therefore, the total cost of the shirt with tax can be expressed as:
\[ d + 0.05d \]
This expression combines the original price of the shirt \( d \) and the sales tax \( 0.05d \).
Now, simplifying this expression:
\[ d + 0.05d = 1d + 0.05d = 1.05d \]
Thus, the expression that can also be used to represent the total cost of the shirt, including the sales tax of 5%, is:
\[ d + 0.05d \]
So the correct answer is:
d + 0.05d