A simple kernel for adding two integers: __global__ void add( int *a, int *b, int *c ) { *c = *a + *b; } where __global__ is a CUDA C keyword which indicates that:

• A. add() will execute on device, add() will be called from host
• B. add() will execute on host, add() will be called from device
• C. add() will be called and executed on host
• D. add() will be called and executed on device