题目内容：
阅读文章，回答题：You ask how to start a business?Here is anexample．
David Dawson，a serious mountain climber，was dissatisfied with soft iron pitons(锥锤)，the only ones he was able to buy．They lastedjust one or two climbs，and Dawson wanted toreplace themwith“chrome—molys”(铬铝合金)，whichwere harder，stronger and longer-last—ing．Some climbers made them for limited distribution among friends，but they were not com—mercially available．SoDawson started Dawson Equipment Ltd．，a purveyor(承办商)0fclimbing equipment，as a one—manenterprise in Burbank，California，in 1958．He had noplan，no management experience and no advertising．Heworked in a shed using a hand forgepurchased with$800 0f capital borrowed fromhis mother．
WhatDawson did have was a knowledge of the kind of equipment that he needed inhisown climbs，anda sense that serious climbers would follow his lead．CurrentlyDawson Equip—ment is thriving and produces over 200 products．
Business opportunities are mere than ampletoday for the simple reason that many consumersare dissatisfied．Dawson’s business startedfrom his being a customer not liking what he bought．Isuspect that your business will begin that way t00．Youknow what you want to replace，im—prove or change．So begin where the tool breaks，the serviceslips or the shoe pinches．
Dawson was dissatisfied with soft ironpitons because_________． A．they were made of iron
B．they coul not last long
C．they were the only pitonshe could afford to buy
D．they were too soft to bearthe climber's weight
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