Which of the following is the most credible source?
o
a. the personal website of professor shweta singh of the university
of new mexico, last updated in 2005
o
b. an article on the website of a major newspaper, written by
journalist melissa knowles and published this year
o
c. an article in a major scientific journal, written in 1968 by a team of
scientists with phds in particle physics
o
d. original charts and graphs displayed on the blog of peter
wilkerson, a popular activist and internet personality