ok given a plane trimmed for straight and level flight, what would be the expected result of applying 1/4"deflection of flaps?

I have so far recieved to differant responses and reasons

1. would go nose up because of the increase oflift

2. would go nose down because of drag and increase of undercamber of the airfoil


and would the same effect be expected if the deflection was increased to 1/2"