UC application update

Hello,

I’m an undergraduate student waiting for transfer decision. In another country, I finished high school, moved up to a college and finished it before moving to the US and started again in a community college. In my UC application I left out the gap of 4 years in college (means I didn’t mention anything about the time) because I thought a foreign college would mean nothing, if not disadvantageous for my application. UC sent an update request, asking me to explain the 4 year gap, whether I attended any college during the time. I know that this could mean dishonesty and get on the nerve of some people, but do you guys think it would be better if I tell them the truth or should I explain that I was working for the 4 years?

Thank you