You are writing a report analyzing whether your company should hire a new vendor to provide data$-$warehousing services. You have found a white paper online that looks promising. How can you judge the degree to which the authors are unbiased?

a$)$ Check to see if the authors work as industry$-$wide consultants or as contractors for specific vendors.

b$)$ Check to see if the authors have advanced degrees.

c$)$ Check to see if the authors appear to be related to each other.

d$)$ Check to see if the authors have offices in the same cities as your potential data$-$service vendors.