Maya, an L$4$ Area Manager $($AM$)$ has designated ownership of trailer check$-$in$/$check$-$out process to her Tier $3$Process AssistantAccording to the RACI matrix in START which role is ACCOUNTABLE for Yard Safety?a$)$ L$6$ Ops Managerb$)$ Area Managerc$)$ Process Assistant $($PA$)$d$)$ Yard Marshal