Select the code snippet which performs matrix multiplication.(a and b are the two given matrices, resultant marix is c)

A.

for (int i = 0; i < n; i++)
{
    for (int j = 0; j < n; j++)
    {
        for (int k = 0; k < n; k++)
        {
            c[i][j] = c[i][j] + a[i][k] * b[k][j];
        }
    }
}

B.

for (int i = 0; i < n; i++)
{
    for (int j = 0; j < n; j++)
    {
        for (int k = 0; k < n; k++)
        {
            c[i][j] = c[i][j] * a[i][k] * b[k][j];
        }
    }
}

C.

for (int i = 0; i < n; i++)
{
    for (int j = 0; j < n; j++)
    {
        for (int k = 0; k < n; k++) 
        {
            c[i][j] = c[i][j] + a[i][k] + b[k][j];
        }
    }
}

D.

for (int i = 0; i < n; i++)
{
    for (int j = 0; j < n; j++)
    {
        for (int k = 0; k < n; k++) 
        {
            c[i][j] = c[i][j] + a[i][j] + b[k][j];
        }
    }
}

Answer: Option A