B.
A is wrong because there are more than 3 races
C is wrong because it goes against race being socially constructed
D also goes in favor of race not being socially constructed
<span>Your waiter seems to be doing everything wrong. he has forgotten to take your drink order. he delivers someone else's food to your table. he delivers someone else's food to your table. he does not come out and say it, but his facial expressions seem to say he'd rather be someplace else. if you assume his behavior is caused primarily by his disposition, your assumption is consistent with the fundamental attribution error. The waiter is disposition is good in the waiter in good work involving the area.</span>
C because it makes the most sense
The researchers kept their identities secret because, if they had revealed that their purpouse was to conduct an experiment on the behaviours of the people in the bar, it might have triggered that some people changed their usual attitudes because they know that their 'figures' will be kept in a record.
Maybe some people will drink less as they feel embarrased if some other person is testing how many beers they end. Others, might want to prove themselves 'strong' and drink much more than usual. People change their behaviour sometimes when they are aware that they are watched. This is called the observer effect.