title: Binary tree on a vector
body: <p>I want to know this question (only one is correct)<br>
  A implementation of a binary tree with a vector:<br>
  a) Only advisable if the tree is a heap<br>
  b) only advisable if the tree is decision<br>
  c) We can use a vector if we want to build search trees<br>
  d) The tree has to be ordened for use the vector<br>
  e) None of the previous  </p>
  
  <p>I would like to know the answer and why, I have problems with a,c,e, i wouldnt decide my response.</p>