(c) \( 4-15 \div(-3)+(-8) \)

Let's break down this expression step-by-step. First, you need to handle the division before combining the rest. So, \(15 \div (-3)\) gives you \(-5\). Now, the expression looks like this: \(4 - (-5) + (-8)\). Next, subtracting a negative is the same as adding, so it becomes \(4 + 5 - 8\). When you add \(4 + 5\), you get \(9\). And when you subtract \(8\) from \(9\), the final answer is \(1\). Thus, \(4-15 \div(-3)+(-8) = 1\).