For x≥0 the smallest value of \frac {4x^2 \plus{} 8x \plus{} 13}{6(1 \plus{} x)} is:
<spanclass=′latex−bold′>(A)</span>1<spanclass=′latex−bold′>(B)</span>2<spanclass=′latex−bold′>(C)</span>1225<spanclass=′latex−bold′>(D)</span>613<spanclass=′latex−bold′>(E)</span>534