Which of the Following Pieces of Advice for Producing Biscuits

Which of the following pieces of advice for producing biscuits is correct?

A) Be sure to give your round hand cutter a vigorous twist as you cut your biscuits.
B) The flakiest biscuits can be produced by using less shortening and cutting it in more.
C) If you would like to produce a crustier, but slightly smaller biscuit, knead the dough a little longer than usual.
D) Softer biscuits will result if you place them so they touch each other on the baking sheet; crisp-crusted biscuits will result if you place them at least ½ inch apart.