Adjective for a decision that had no real alternative

I'd like to express the fact that there were no viable alternatives to a decision I took.

My decision to attend university X was stringent / without alternative / a no-brainer / objectively necessary because it was the only one offering the course in which I am interested.

I'm not sure whether stringent in this context is appropriate. The rest of the listed phrases in italics are passable for my taste but I'd like to use a single word to express the notion of having no real alternative.

Solution 1:

You may use inevitable:

• Impossible to avoid or prevent; certain to happen.

(AHD)

Solution 2:

Your choice was a foregone conclusion, also sometimes expressed as fore-drawn conclusion.