A SCUM question

Can you help to answer below question:

Question: Which (2) things SM do if the Dev Team does not have the engineering tool and infrastructure to completely finish any Product Backlog items ?


A: Asks the Dev team to spend as many Sprints as necessary to prepare the sngineering tools and infrastructure so any Product Backlog item it selects is protentially.

B: Asks the Dev Team to do the best it can on each Product Backlog item it selects.

C: Has the Dev Team improves its skill, tools and infrastructure over time & ajust the defination of "done" accordingly.

D Has the Dev Team define "done" and do the same work for all Product Backlog items it selected.

E: Declares the Dev Team not ready for Scrum.


Thanks.