The project time management processes include ______ .

A．define activities, sequence activities, estimate activity resources, and estimate activity durations

B．define activities, activity sequencing, and activity duration estimating

C．activity identification, activity execution, and activity results

D．activity determination, activity duration estimating, activity implementation, and activity results

装配式拱桥施工过程中，应配合施工进度对拱肋、拱圈的挠度和（）、混凝土裂缝、墩台变位、安装设施的变形和变位等项目进行观测。