Let

. Then

, and so as

, you have

. The limit is then equivalent to
Let x be the number of refrigerators
Y be the number of pianos
So the inequality:
300x + 475y < 7100
So substitute 12 and 8 to the inequality
300(12) + 475(8) < 7100
3600 + 3800 < 7100
7400 < 7100 is not true
So it will overload the truck
The answer is C, Ik this bc I already finished learning this