The correct answer is "Selling Treasury Bills and Treasury Bonds".
The other options are not possible because:
collecting taxes is not "borrowing"
Issuing stock - this is something that companies do when they sell a share in the ownership of it, not government
And goverments don't usually borrow from banks, instead they issue documents promissing to bay back the money (along with an interest) to whoever buys those documents: selling Treasury Bills and bonds.
