How many distinguishable rearrangements of the letters in CONTEST have both the vowels first? (For instance, OETCNST is a one such arrangements but OTETSNC is not.)
<spanclass=′latex−bold′>(A)</span> 60<spanclass=′latex−bold′>(B)</span> 120<spanclass=′latex−bold′>(C)</span> 240<spanclass=′latex−bold′>(D)</span> 720<spanclass=′latex−bold′>(E)</span> 2520 countingdistinguishability