A. Yesterday, Leo had a __more difficult__ time sleeping than today.
B. is incorrect because it is incorrect to say one has "a difficultly time" doing anything; you have "a difficult time" doing something.
C. is incorrect because you can not say "most" when comparing something to something else; you can either say "It was the MOST difficult" or "It was MORE difficult than that."
Unlike the woman in the sedan who swung off the road in an effort not to hit the turtle, the driver of the light truck actually veered to hit it. So, he struck it on the verge of the shell, and it flipped and flew off the road, to safety. Frightened and motionless, the turtle kept lying on its back, and then it started an effort to roll over and go away.