What are prerequisites?

The customer uses the on-premise edition of SAP Enable Now and wants to roll out the Desktop Assistant.

What are prerequisites? Note: There are 2 correct answers to this question.
A . The Desktop Assistant must be installed on every end user machine.
B. Java must be installed on every end user machine.
C. The Desktop Assistant browser plug-in must be installed on every end user machine.
D. The customer’s client infrastructure must be Microsoft Windows.

Answer: A,D