Which describes a sign of bias in a source? It was updated recently. It was written by a famous author. It uses secondary instead of primary sources. It has general rather than specific descriptions.

This is what i found on google “the first mobile phone call was made 40 years ago today. on april 3, 1973, motorola employee martin cooper stood in midtown manhattan and placed a call to the headquarters of bell labs in new jersey.” i hope this you for what your looking.