A. long wavelength; small
Diffraction is the greatest whenever the gap where the wave is passing through is smaller. This gap property will make the wave to "curve" reaching a more wider area, the smallest the gap is, more the wave will curve, spreading more widely. The light would propagate more rather then being concentrated on one focus. The wavelength is also something that affects diffraction. Whenever the wavelength is longer, the wave will have more time to spread sideways after diffraction.
I like that I woke up after a sleep over with my friend
and I don't like waking up in my period
25% chance because when you do a Punnett square for your genes you find that only 1 of 4 are tt and 2 are TT and one is Tt so the percentage for the plant to be short would be 25%