The passive sentence is
→ B. It was said that the store had a good sale
This sentence uses simple past tense
✐ formula past simple
(+) O + was / were + Verb 3 (by S)
(-) O + was / were + not + Verb 3 (by S)
(?) Was / were + O + Verb 3 (by S)?
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Subject: English
Keywords : Passive Voice, Past simple
Hope this helps you!!! :D