Participants in speed-dating encounters can form a feeling about a conversational partner and register whether the partner likes them in about minute(s). if women at a speed-dating event stay seated while the men circulate, men wish for future contact with more of their speed dates than do women.

4 minutes

Explanation:

Speed Dating events usually take place in bars, restaurants or nightclubs, in environments with conditions for quiet, relaxed and fun conversation. An average of 20 people of each sex are gathered at the event venue, forming a total of 40 participants, who will meet through 4-minute conversations on average per couple. It may seem like a short time, however, according to research, it is not enough more than 3 minutes for a person to know if there was a "chemistry" between the couple.

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even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.