To make it easier to find the answer, you can switch to decimals
[tex]2 \frac{3}{4} = 2.75[/tex]
[tex]3 \frac{1}{4} = 3.25[/tex]
Now you multiply them together
2.75 × 3.25 = 8.9375
From there, you don't have to do more math because you can tell the answer is D because of the whole number
The answer is D
Hope this helps!