Top: ratios of prompt and non-prompt D-meson production cross sections as a function of $\pt$ in pp collisions at $\s = 5.02$  and 13  TeV. Bottom: ratios of prompt  and non-prompt D-meson production cross sections as a function of $\pt$ in pp collisions at $\s = 13$ TeV compared with FONLL+PYTHIA 8 predictions The vertical bars and empty boxes report the statistical and systematic uncertainties, respectively.