In the 1930s,when Anti-Asian Prejudice Was Commonplace in the United

In the 1930s,when anti-Asian prejudice was commonplace in the United States,Richard LaPiere (1934) had no trouble finding pleasant accommodations for himself and his Chinese traveling companions.Surprised,LaPiere later sent letters to the establishments they visited,asking whether Chinese visitors would be welcome.More than 90% of those who responded replied that they definitely would not accommodate Chinese.Although LaPiere's study suggests that there is a weak link between attitudes and behaviour,his results should be interpreted with caution.Why?

A) LaPiere's sample of proprietors was not randomly selected.
B) LaPiere did not control for extraneous variables.
C) More systematic research later revealed that there is generally a strong relation between attitudes and behaviour.
D) Proprietors' attitudes might have changed between LaPiere's visit and the time he sent the letters.
E) Prejudice has generally declined in the United States since the 1930s.