Which is not true regarding the differences between goods and services?

a$)$ Services tend to have higher customer interaction than goods.

b$)$ Most goods are common to many customers; services are often unique to the final customer.

c$)$ Goods can be inventoried; services are not easily inventoried.

d$)$ Services tend to have a more inconsistent product definition than goods.

e$)$ Tangible goods are generally produced and consumed simultaneously; services are not.