在市场经济条件下，每个商品生产的经营者都是独立的经济主体，都有充分的自主权。因此，他们生产什么，如何生产都由自己说了算。
以下哪项最能削弱上述结论( )

A．商品生产的经营者都是独立的经济主体就意味着由自己决定自己的命运
B．商品生产经营者享有充分的自主权利这就意味着由自己决定生产什么
C．商品生产经营者必须了解市场行情和消费者的需求等，才能生产出适销对路的产品
D．每个商品生产的经营者虽然是独立的经济主体，但是在经营中也要顾及他人的利益

"I would almost rather see you dead. " Bobert S. Cassatt, a leading banker of Philadelphia, shouted when his twenty-year-old eldest daughter announced that she wanted to become an artist. In the 19th century, playing at drawing or painting on dishes was all right for a young lady, but serious work in art was not. And when the young lady’ s family racked among the best of Philadelphia’s social families, such an idea could not even be considered.
That was how Mary Cassatt, born 1844, began her struggle as an artist. She did not tremble before her father’s anger, she opposed him with courage and at last made him change his mind. Mary Cassatt gave up her social position and all thoughts of a thousand and a family, which in those times was unthinkable for a young lady. In the end, after long years of hard work and perseverance, she became America’s most important woman artist and the internationally recognized leading woman painter of the time.

What do we know about Robert Cassatt’s character from the text

A. He was a cruel man.
B. He was a stubborn (固执的) man.
C. He knew nothing about art.
D. He knew little about his daughter.