Over the past several decades,the number and scale of interest groups at the national level has

A) dramatically increased.
B) experienced relatively modest growth.
C) remained relatively stagnant.
D) experienced relatively modest decline.

The statement "the number and scale of interest groups at the national level has dramatically increased" indicates that the correct answer is A. There has been a significant growth in the number and scale of interest groups at the national level over the past several decades. This can be attributed to several factors such as the increase in the size and complexity of government, the rise of social media and other technological innovations, and the growing awareness of and interest in political issues among the general public.