If f(t) = sin(at) – atcos(at), then its Laplace transform is given by?

• A. Indeterminate form is encountered
• B. a3 ⁄ (s2 + a2)2
• C. 2a3 ⁄ (s2 – a2)2
• D. 2a3 ⁄ (s2 + a2)2