If a * b * c =(√(a + 2)(b + 3)) / (c + 1), find the value of 6 * 15 * 3. Choose the correct answer:
A) 8
B) 5
C) 11
D) 3
E) 4

Rationale: "6 * 15 * 3 = ( √ ( 6 + 2 ) ( 15 + 3 ) ) / ( 3 + 1 ) = ( √ 8 * 18 ) / 4 = ( √ 144 ) / 4 = 12 / 4 = 3 . answer is d ."
Answer: D