毛 * * 说：“邀集一堆人，不作调查，而只是冥思苦索地‘想办法’、‘打主意’，须知是一定不能想出什么好办法，打出什么好主意的。”这段话蕴含的认识论道理是

A．书本知识不可信

B．获取认识的唯一途径是实践

C．实践是认识的来源

D．冥思苦索无助于“好办法”、“好主意”的产生

—How do you find your new sweater? 

—      . It’s really worth the money I paid.

A．Quite by accident

B．Well, the style is out of date

C．The department store is selling everything at a discount

D．It washes very well