Which one of the following was the landmark Supreme Court of Canada decision that established the need to take a contextual approach in determining whether a dismissal was for just cause?

$($a$)$

$($b$)$

$($c$)$

$($d$)$

Question $21$ options:

McKinley v BC Tel

Weisenberger v Marsh Canada Limited

Obeng v Canada Safeway Limited

Henry v Foxco Ltd$.$