One word of caution with CBD - and I don’t know this to be 100% true, but it might bring about a positive test if your job requires drug testing. Mine does, and it’s random. We were given a warning at work due to someone in the outfit testing positive and stating that they had used CBD.
Not worth taking a chance, I don’t think.
Note:"I'm studying for a test" is the polite way of refusing toke when offered.