What sentence is used incorrectly?

In achebe’s things fall apart, okonkwo finds his son nwoye’s signs of laziness "disquieting" because it reminds him of his wife his father his other son his younger self

Which statement best completes its flow of reasoning

If you had read the label carefully, you wouldn’t have bought the expired product.what does it means? a. you didn’t buy the expired product because you read the level carefully.b. you didn’t read the label carefully so you bought the expired product.