A)It is quite random. Normally(using boss' CoolGameplayPatch) the first few 2-5 overs produce varied seam movement on all pitches, especially to balls at a good length or pitched up. Just try varying your pace and seam movement. A bit of luck helps. Also watch the bowling marker when the CPU bowls, it would help.
B)You can only get the ball to reverse with a Medium bowler, just bowl an Inswinger and move the marker as you would for and Awayswinger and vice-versa. It does help at time. We might get the ball to reverse with Sam's new .exe, we just have to wait.
C)Read the answer to Question A.
Hope this helps.