This belief in the monetary value of education is 【34】______ by research outcomes on income. Ben Wattenberg, a social scientist, estimates that in the 【35】______ of a lifetime a man 【36】______ a college school diploma in 1972 could earn about $380,000 more than a man who 【37】______ had a high school diploma. Perhaps this helps to explain survey 【38】______ which showed that Americans who 【39】______ they had lived their lives differently in some way regretted 【40】______ of all that they did not get more education. The regret is 【41】______ by those who have made 【42】______ to the top and by those who have not. 【43】______ a man like Douglas Fraser, the president of the United Auto Workers Union, a nationally known and successful leader, was 【44】______ by regrets that he did not climb higher on the 【45】______ ladder.
【26】

A. however
B. therefore
C. moreover
D. though