You are looking at joining jim's gym. read the extract of their information leaflet below, and correct the error in tense.

You didn't provide the extract here, but I managed to find it somewhere on the Internet.
Anyways, the error in tense can be found in the second sentence - We also had a 20-metre pool and a spa. The error is the verb had, which should be corrected into have, given that the gym still has the pool and the spa - it should be in the present, not the past tense.

Yeah the answer would be d not c