Answer:
d) Are generally useful sources for finding new channel members.
Explanation:
Trade shows are events or exhibitions of a company where different companies and organisations participate to showcase their products and new offerings.
And conventions are general meetings of business men and industry people to discuss about their products and success.
In all theses events and meetings, many industry people and entrepreneurs come and gather at a place to showcase their achievements and products. They are useful source for searching new channel partners for business and commerce.
People here exchanges ideas and innovations. They try to connect with each other to expand their business.
Thus the correct answer is ---
d) Are generally useful sources for finding new channel members.
Japanese Americans were put in camps in some places because it was thought they might try to contact Japan and betray America.