Why Is the Process for Amending the Constitution a Source

Why is the process for amending the Constitution a source of path dependency?

A) After the Constitution was amended once, adding new amendments became easier and easier.
B) Once the Constitution was adopted, the amending process requires supermajority support from multiple institutions and levels of government.
C) Politicians learned how to amend the Constitution over time, so it became easier.
D) Congress often prefers to incorporate its policies into the Constitution instead of enacting public laws.