(A) Since the senate decides the outcome of a judicial nomination submitted by the president, and in this case, the senate is generally negative to this nomination, the senate will likely vote no on the supreme court nominee.
(B) The president has few options, but an action they could take is nominating a whole new supreme court justice.
(C) If seven of the eight current justices were of the same party and ideology as the president, the president may not want to nominate another justice as this may be viewed negatively by the public. This may be interpereted as attempting to merge two branches of government together, and would be so if eight of nine justices have the same ideology as the president.
If the president were to nominate a justice in this scenario, congress would likely not approve the nominee for fear the president may be pushing his or her power, and that it might negatively affect congress in the future.
I hoped that helped you!