ANSWER
C. 90 square milli
EXPLANATION
The area of a parallelogram is calculated using the formula,
[tex]Area = bh[/tex]
The base of the parallelogram is b=18mm.
The height is h=5mm.
We substitute the values into the formula to get,
[tex]Area = 5 \times 18 = 90m {m}^{2} [/tex]
The correct answer is C