1. Variation in carbon chains is an important source of molecular complexity. Howcan carbon skeletons vary?
(A)Carbon skeletons can vary in length and contain rings of carbon atoms
(B)Carbon skeletons can vary in length, exhibit different branching structures, containdouble bonds at different positions, and contain rings of carbon atoms
(C)Carbon skeletons only vary in length
(D)Carbon skeletons can vary in length and contain double bonds at differentpositions
(E)Carbon skeletons can vary in length and exhibit different branching structures