4. You mustn't tell anyone this information. Make sure you….
a. don’t keep it under your hat - Wrong, you want the person to keep the secret, you
want them to keep it under their hat
b. keep your nose out of it - Wrong, this means you want them to mind their own
business
c. don’t keep your ear to the ground - Wrong, this means don’t listen out for
information
d. keep it under your hat - Correct, don’t tell anyone the secret!