“ The opportunity for the alien to plead in the alternative is an ample basis for the Attorney General to find, without abusing his discretion in a situation such as the present one, that the failure of the alien to so plead has not been reasonably explained.↑ Indeed, in Abudu, supra, the alien had moved to reopen his deportation proceedings to pursue claims for asylum and withholding of deportation based on persecution he feared in his home country of Ghana in the event that his designation of England as the country of deportation proved ineffective. ”

“ Motions to reopen in deportation proceedings shall not be granted unless it appears to the Board that evidence sought to be offered is material and was not available and could not have been discovered or presented at the former hearing. ”

“ Abudu, 485 U.S., at 107-108, 108 S.Ct., at 913. This is especially true in a deportation proceeding where, as a general matter, every delay works to the advantage of the deportable alien who wishes merely to remain in the United States. ”