help fast please???

There is a rule that specifies whether or not the triangle exist.
Rule: When added, the two smaller sides of the triangle must be greater than the longest side.
In this case answer C fits the choice.
Since the small sides are 8cm and 15cm
8 + 15 = 23
And the biggest side of the triangle is 22
23 > 22
Answer = C. 8cm, 5cm, 10cm