d. Multi-task jobbenjs s she and ska. Shabbat. D
When you enumerate you need to put comas between all the items except the ones which are connected by "and" : as A is not correct as it does not have comas, and B is incorrect as it has comas where "and" is.
now, in a way both C and D are correct, but C is the usual accepted version, and D is an example of "Oxford coma" (where the coma is optional, to remain on the safe side, choose C).
The speaker thing that he is going to die soon because he spent his life for the purpose of pleasure without paying attention to their well being.
you can see it on these lines :
- We left school
- We thin Gin
- we die soon
hope this helps