Can I refuse to rerate if I fail the TS clearance?

Only thing I’m really worried about is my parents aren’t citizens but they are residents.

I didn’t want to join the navy unless I got the rate I wanted (CTR) and now that I got it, can they take that away from me and tell me to go PACT, for instance, if I don’t pass the TS clearance?

Cause id rather stay home and go to community college than stay trapped in a rate that I didn’t want.

Or would I have no choice but to rerate?