Was the universe open or closed before inflation?

If the spatial curvature of the universe at the beginning of inflation is negative, there is an enhancement of the temperature anisotropy of the Cosmic Background Radiation at large angles. On the other hand if at the start of inflation the universe was closed with curvature there will be a suppression of temperature anisotropy at the scale of the present horizon. The observation of a low quadrupole anisotropy by WMAP suggests that the universe was closed with $(\Omega-1)$ of order unity at the time when the perturbation scales of the size of our present horizon were exiting the inflationary horizon