“I'm keeping my options open.”

You're a first-year college student and you haven't decided on your major (your area of study) yet. You are talking to a professor who asks what your major is. You want to tell her that you haven't decided yet, but you want it to sound like a positive thing. You say:

I'm keeping my options open.

keep (one's) options open

To "keep your options open" means not to decide on something, so that you don't restrict yourself. It means to stay undecided so that you can still choose freely later on.

Keeping your options open is usually considered a positive thing.