A/B flux density ratio focused on the C IV spectral region. The blue dashed line represents the adjacent, unabsorbed, continuum ratio. The red line underlines the BEL ratio (interpolated with black dots when contaminated by intervening absorptions), which is significantly higher than the unabsorbed continuum ratio. The green lines underline the flux ratio in the intrinsic absorption lines, which appears significantly lower than the unabsorbed continuum ratio.