The question being studied concerns Bed Bath and Beyond. The specific research question is$,$ "should Bed Bath and Beyond close more brick$-$and$-$mortar stores, and begin investing in distribution centers and online marketing strategies?"

A data collection strategy in which experts anonymously respond to questionnaires with the goal of reducing the range of responses, thereby leading to a convergence of expert opinion, describes what kind of method?

Group of answer choices

Delphi.

Group decision room.

Mobile voting.

Walk$-$about.