A single-interest group is a group that is trying to push forward legislation and momentum around, well, a single-issue.
This might mean gun-control or reproductive rights.
They might have candidates in one party that they prefer but they are broadly trying to convince ALL candidates to believe what they believe.
So, B is the correct answer.
They did this so when the Mongols took over China, the Chinese could not gain high power and over throw the mongols.
Answer: The correct answer is A.
an investor holding 11% of ABC preferred stock
(insider = officer, director, 10% common shareholder or affiliated person)