Which best describes why it is necessary to evaluate a solution?
a. to eliminate all roadblocks to success
b. to determine whether it is working
c. to show there is interest in its success
d. to ensure everyone is happy with it

Interest groups representing businesses and investors are often among the most successful lobbying groups for all of the following reasons, except a. such groups have the financial resources to mount sustained campaigns on their own behalf b. these groups' members contribute heavily to many legislators' campaigns and in so doing gain greater access to legislators c. these groups have often been in existence for decades, allowing them to both master the legislative system and develop close ties with legislators d. the members of these groups make up the majority of voters in many districts