Answer:
B. Be in View Mode.
D. Select an environment element.
Step-by-step explanation:
Cisco packet tracer can be defined as a software application or program designed to avail end users the ability to simulate a network. Therefore, it is typically used to present the graphical representation of a logical network and to properly configure network devices such as routers, switches, host devices etc., before they are physically deployed or installed at their primary location.
The two (2) steps which must be followed in order to view a working graph or chart of environmental changes in Cisco packet tracer includes;
I. Be in View Mode: the user must ensure he selects the view mode in order to see all environmental changes or working graph.
II. Select an environment element: you should select any of the environment element such as actuators, boards and sensors.