老師好，左邊是166的解析，右邊是題目。我想請問為什麼答案會是B，其他三個演講者的主題分別是： Edward Dutton ☞ Social Networks: Reconfiguring access to people Ronda Ward ☞ Social software in a hard world Ronald Allan ☞ Social networking and business practice: A case study in the telecoms industry