The Qur'an itself doesn't use the word "Bible", but "Torah", "Zabur" and "Injeel" which were revealed to Moses, David and Jesus respectively. Meanwhile, the Bible was written by some 40 authors, many of whom the Qur'an doesn't recognize. For example, a large chunk of the New Testament was written by Paul, whom the Qur'an doesn't recognize as a Prophet, so the term "New Testament" is meaningless to the Qur'an. Many of the teachings of Paul contradicted that of Jesus, for example, Jesus said in Matthew 5:17,
Do not think that I have come to abolish the Law or the Prophets; I
have not come to abolish them but to fulfill them.
and also added that (Luke 16:16),
It is easier for heaven and earth to disappear than for the least stroke of a pen to drop out of the Law
Which are supported by the verse of the Qur'an (61:6) which states,
O children of Israel, indeed I am the messenger of Allah to you
confirming what came before me of the Torah
Meanwhile, Paul spent his entire ministry arguing for the futility of the Law. In fact, Muslims don't believe the writings of Paul to be properly called a "corruption" but as forgery (Q2:79),
So woe to those who write the "scripture" with their own hands, then say, "This is from Allah ," in order to exchange it for a small price. Woe to them for what their hands have written and woe to them for what they earn.
In a summary,
Muslims believe that any "subsequent inspiration" from Jesus after his ascension to be forgery, and these includes all of the writings of Paul. This also includes teachings such as "Go, teach all nations" (especially if we're to understand "nations" to include non Jewish people), as Muslims believe Jesus was sent to the Jews ONLY a fact which was also corroborated by Jesus himself during his ministry. Muslims believe there was no other prophet between Jesus and Muhammad.
The Gospels according to Matthew, Mark, Luke and John contain some of the teachings of Jesus, but they are not the injeel. They were so-called "eye witness" accounts of some of the disciples of Jesus about his life. Muslims disagree about their account of the crucifixion and even these gospels disagree on some points between themselves.
So to conclude, Muslims primarily agree with No. 1 i.e. "Some of the Bible is corrupted". The yardstick Muslims use is to prefer the Qur'an version whenever there's a conflict between the Qur'an and the Bible. Traditionally, Muslims also disagree with some of the less flattering descriptions of the Prophets such as Lot, Solomon and David, which they find unbecoming of the Prophets of God.