$1-9(20$ points$)$ CCPS elements: Classify the following activities as being most directly related to one of the $20$ elements of RBPS$.$ Although many elements may be involved, list only the single most applicable element. An element may be used more than once.

a$.$ All contractors on site are required to watch a video with an overview of the plant process safety and may be required to complete additional safety training depending on the type of work.

b$.$ The plant manager demonstrates a shared responsibility for the plant safety.

c$.$ The plant has an open house for the local community.

d$.$ A plant$-$wide emergency response drill is completed once each quarter.

$2$