【名词&注释】
目标管理(objective management)、课外活动(extracurricular activities)、民主管理(democratic management)、理论联系实际(theory with practice)、体育活动(sports activities)、社会活动(social activities)、科技活动(science and technology activity)、等比数列(geometric progression)、承担责任(undertake responsibility)、社会政治活动(social political activities)
[单选题]8,8,12,24,60,(
A. 90
B. 120
C. 180
D. 240