Answer:
A) Janitorial services company: Job costing: janitorial services vary depending on the infrastructure. E.g. It is not the same to do a job for a large office building or for a condo.
B) Soup manufacturer Process costing: the products are the same and they manufactured in a standardized production line.
C) Commercial plumbing contractor: Job costing: a plumber's job changes depending on the infrastructure where he needs to works, it is not standardized. E.g. It is not the same to do a job for a house or for a condo.
D) Toothpaste manufacturer: Process costing: the products are the same and they manufactured in a standardized production line.
E) Catering service: Job costing: catering services vary depending on the customer and the amount of customers that will be served. E.g. it is not the same to cater a child's birthday party or a wedding.