In which of the following situations has there been no violation of nasaa rules? a. an agent omits mentioning a material fact necessary to make a presentation about a security not misleading, but the customer decides not to buy the securityb. an agent misstates a material fact to a customer when recommending a security, and the customer buys that security and enjoys a profitc. an agent makes a recommendation to a customer, disclosing all relevant information about the issue known to that agent and the customer buys that security and suffers a lossd. any of the above

Wo firms, a and b, each currently dump 50 tons of chemicals into the local river. the government has decided to reduce the pollution and from now on will require a pollution permit for each ton of pollution dumped into the river. it costs firm a $100 for each ton of pollution that it eliminates before it reaches the river, and it costs firm b $50 for each ton of pollution that it eliminates before it reaches the river. the government gives each firm 20 pollution permits. government officials are not sure whether to allow the firms to buy or sell the pollution permits to each other. what is the total cost of reducing pollution if firms are not allowed to buy and sell pollution permits from each other? what is the total cost of reducing pollution if the firms are allowed to buy and sell permits from each other? a. $3,000; $1,500 b. $4,500; $3,500 c. $4,500; $4,000 d. $4,500; $2,500