Best UCs for Undecided/Undeclared?

@ucbalumnus I’ve really enjoyed all of the science classes I’ve taken throughout high school (Bio, Chemistry, Physics) so I’m a bit torn about settling into one. I’m taking an Engineering class this upcoming year to see if it would be something I would want to major in since it is a very impacted major in most places. If not, I would be open to biology, physics and maybe even psychology (if that counts as STEM) majors.