In direct quotation, the front number indicates the bank's buying price, which is also the customer's selling price. Example: USD/CHF1.45271.4532, and the purchase price is1.4527; It means that you can sell 1 USD and buy 1.4527 Swiss francs. The target of bank quotation is mainly the price that the bank is willing to accept, so the sale is for the bank itself. Moreover, because holding a certain currency needs to bear certain risks and transaction costs, the buying price of banks is usually lower than the selling price. Therefore, whether in direct quotation or indirect pricing method, whether in direct currency pair or cross currency pair, the lower quotation is usually the exchange rate at which banks buy (sell) foreign currency, while the higher quotation is the exchange rate at which banks sell (buy) foreign currency.

So the answers to this question are B and C.

I hope it helps you.