By not accepting public finance contributions during the presidential campaign, barack obama his cause because a.) he would not need to repay nearly as much money b.) he was able to spend less time trying to come up with funds c.) he was not limited on how much money he could raise d.) there was less of a need to solicit funds from outside sources

The correct answer is:

c) He was not limited on how much money he could raise.

Public finance contributions for presidential campaigns were used by almost any party until recent years. This means that if a candidate collects $100,000 for the primary, along with at least $5,000 in small contributions from a minimum of 20 states, he becomes eligible for public funds that match the donations received.

However, public funding has a spending limit. As Obama initiated, in the present, most major-party candidates reject public funding because they can raise and spend much more money on their own.  

the answer wold be b) travel among nations should be regulated by an international organization

i think the answer is a and i hope this ; ))