A random sample of 225 bolts from machine A contained 18 defective bolts, while an independently chosen, random sample of 325 bolts from machine B contained 29 defective bolts. Let p₁ be the proportion of defective bolts from machine A and p₂ be the proportion of defective bolts from machine B. What is the 90% confidence interval for the difference in the proportions of defective bolts from the two machines?
A) (-0.05, 0.05)
B) (-0.15, 0.05)
C) (-0.10, 0.10)
D) (-0.07, 0.03)