To make it easier to find the answer, you can switch to decimals
![2 (3)/(4) = 2.75](https://img.qammunity.org/2019/formulas/mathematics/middle-school/ruwwl0taxbukxbghkhguhpfs09dowqmesh.png)
![3 (1)/(4) = 3.25](https://img.qammunity.org/2019/formulas/mathematics/middle-school/kgf7z9djhum8g14vaixfn561ambcvdi1dc.png)
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!