Correct option is (a) .list-unstyled
Explanation: .list-unstyled removes default list-style and left margin on list items, it works on both <ul> and <ol>, this class only applies to immediate children list items to remove the default list-style from any nested lists, can be applied to any listed lists as well. .initialism displays text inside <abbr> tag. All items in a single line is displayed by .list-inline.
