Which of these is correctly ordered from greatest steric strain to least steric strain?
A. Staggered anti > staggered gauche > eclipsed gauche > eclipsed anti
B. Both staggered conformations are equal in energy and higher than both eclipsed conformations, which are also equal in energy.
C. All conformations are equal in energy as they are the same molecule.
D. Eclipsed anti > eclipsed gauche > staggered gauche > staggered anti.