Which option presents citation information in the most credible way? (5 points) a
According to Elana Martin, company spokesperson, "the error has not been traced to its ultimate source."

b
According to various sources, "the error has not been traced to its ultimate source."

c
"The error has not been traced to its ultimate source," said the company spokesperson during Saturday's interview.

d
This error has not "been traced to its ultimate source," according to a company spokesperson.