Okay! I get that when we say one of (Plural) we use Plural. But I was doing a similar question and got it wrong. Can someone explain?
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) that keeps the housing market from spiraling out of control, like it did earlier in the decade.
b) that keep the housing market from spiraling out of control, as it did earlier in the decade
...
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) that keeps the housing market from spiraling out of control, like it did earlier in the decade.
b) that keep the housing market from spiraling out of control, as it did earlier in the decade
...
