The number of real values of x satisfying the equation 2^{2x^2 \minus{} 7x \plus{} 5} \equal{} 1 is:
<spanclass=′latex−bold′>(A)</span>0<spanclass=′latex−bold′>(B)</span>1<spanclass=′latex−bold′>(C)</span>2<spanclass=′latex−bold′>(D)</span>3<spanclass=′latex−bold′>(E)</span>more than 4