What is the public’s attitude towards online conference?

参考解析：

观点态度题。首先，根据第四段第三句“The conference aims to improve accessibility, cut down on researchers’ carbon footprints and reach a wider audience than a conventional meeting could”可知，该会议旨在提高可及性，减少研究人员的碳足迹，与传统会议相比受众更广；此外，根据第四段最后一句“The response to plans for the meeting, which launched its save-the-date website last week, has been overwhelmingly positive, says Persaud”可知，这次会议的计划得到了压倒性的积极回应。由此可知，大众对于线上会议持支持的态度，与B项符合；A项意为“不确定”；C项意为“失望的”；D项意为“不满意的”，这三项可排除。故选B。