Where can people buy cheap books in London？A．In Charing Cross Road.B．In east End of London

Where can people buy cheap books in London？

A．In Charing Cross Road.

B．In east End of London.

C．In Farringdon Road.

D．Both in Charing Cross Road and Farringdon Road.

请帮忙给出正确答案和分析，谢谢！