RNA is hypothesized to have been the genetic material of the
     RNA is hypothesized to have been the genetic material of the original cell because  RNA is double stranded while DNA is not.  RNA is capable of catalyzing some chemical reactions like self-replication  RNA contains uracil which is more stable than thymine  RNA contains dideoxyribose sugars which are more stable  All of the above 
  
  Solution
The correct option of the given question is (c), which is that the RNA contains uracil which is more stable than thymine. The answer will be more clear from the following elaborated answer.
The RNA world hypothesis- the important points of this hypothesis is as follows:

