Final answer:
The correct answer is option b. 95.
Step-by-step explanation:
The correct answer to the question regarding the re-election rate of US House incumbents is 95%. This high percentage reflects the incumbency advantage, which is evident across various statistics and studies. According to the data, incumbents in Congress have a substantial edge due to factors like name recognition, voting records, previous election success, and more financial support from political action committees and interest groups.
Notably, incumbents have been shown to win re-election between 85 and 100 percent of the time over the last fifty years, highlighting the difficulty challengers face when running against established politicians.