A higher interest rate is only one of the factors, albeit an important one, that keeps the housing market from spiraling out of control, like it did earlier in the decade.
a. keeps the housing market from spiraling out of control, like it did
b. keep the housing market from spiraling out of control, as it did
c. keeps the housing market from spiraling out of control, as it did
d. keep the housing market from spiraling out of control, like
e. keep the housing market from spiraling out of control, like it did