It was good that it took them so long to get the Christmas tree home. It made their glory more drawn out. Francie glowed when she heard a lady say, "I never saw such a big tree!" A man called after them, "You kids musta robbed a bank to buy such a big tree." The cop on the corner stopped them and offered to buy it for ten cents—fifteen cents if they'd deliver it to his home. Francie nearly burst although she knew he was joking. She said she wouldn't sell it for a dollar, even. He shook his head and offered a quarter, but Francie refused it, smiling and shaking her head.

Q. Underline the sentence in the paragraph which shows that Francie understood what the policeman meant when he offered to buy her Christmas tree.