Which sentence is correctly punctuated?

a. i knew i won the award, because my brother works in the sports office and he called me with
the news.
b. i knew i won the award because my brother works in the sports office and he called me with
the news.
c. i knew i won the award because my brother works in the sports office, and he called me with
the news.

the message which is being conveyed is that if a person does not have the qualified skills to be an writer then he should not and if he becomes then just leave it away..

i think this is it plz check

journalism is the gathering, organizing, and distribution of news -- to include feature stories and commentary -- through the wide variety of print and non-print media outlets. it is not a recent phenomenon, by any means; the earliest reference to a journalistic product comes from rome circa 59 b.c., when news was recorded in a circular called the acta diurna. it enjoyed daily publication and was hung strategically throughout the city for all to read, or for those who were able to read.