Google - Which of the following statements about the concept of human races is NOT true?

a.
physical anthropologists today think of human physical variation as mostly continuous rather than discrete variation, and impossible to "categorize"; therefore the concept of fixed races is obsolete.

b.
there is a long historical tradition of classifying and naming human races dating back at least 3,000 years.

c.
the human groups some scientists call "races" do tend to have different skeletal features - these features are still used by forensic anthropologists when trying to identify skeletal remains.

d.
the extensive research of Franz Boas was an important step in debunking the concept of fixed races