What caused the united states to break its neutrality and enter world war i?
a. it had signed a treaty of alliance with england in 1902.
b. the germans were sinking its supply ships heading for france and england.
c. the germans invaded belgium, angering nations internationally.
d. the archduke of austria was assassinated.

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