Which of the following clusters of terms accurately describes DNA as it is generally viewed to exist ...

Which of the following clusters of terms accurately describes DNA as it is generally viewed to exist in prokaryotes and eukaryotes?
 
  A) double-stranded, parallel, (A + T)/(C + G) = variable, (A + G)/(C + T) = 1.0
  B) double-stranded, parallel, (A + T)/(C + G) = 1.0, (A + G)/(C + T) = 1.0
  C) double-stranded, antiparallel, (A + T)/(C + G) = variable, (A + G)/(C + T) = variable
  D) double-stranded, antiparallel, (A + T)/(C + G) = variable, (A + G)/(C+ T) = 1.0
  E) single-stranded, antiparallel, (A + T)/(C + G) = 1.0, (A + G)/(C + T) = 1.0