Weekly STC: Penalty enforcement

[ljudge]

Even though I'm a Fed official I'm interested in seeing NCAA rulings as well to the following:

A's ball 4th and 15 from A20 with :20 seconds remaining in the game and trailing by 6 points. A34 runs a sweep down the right sideline. During A34's run there is a block below the waist by an A player at B's 10 yardline.

A) a member of team B grabs (does not twist or pull) A34's facemask in making the inbounds tackle at team B's 5 yardline.

B) Same as A except there is no foul by a team B player.

In both cases :02 remains on the game clock after the play. Clock? And, how would you explain the options to the captain who has the penalty option in each case?