Answer:
c. they make debt harder to pay back because the real interest rate will be rising, leading to less borrowing and less spending.
Explanation:
Interest rate formula can be approximated by:
r=i-π
r: real interest rate
i: nominal interest rate
π: Expected inflation
If the expected inflation is negative (deflation), then the fomrula will be:
r=i-(-π)
r=i+π
If real interest rate increase, it is harder to pay back debts and borrow money will turn more expensive. People will prefer to save rather to spend because they think prices will be lower in the future. This will traduce in lower consumption and then into a recession.