What Role Do Agency Heads Play in the Normal Budget

What role do agency heads play in the normal budget process?

A) They defend the base amount received the previous year and seek funds for new or expanded programs.
B) They organize testimony at budget hearings and pressure other participants to pursue favored policies and programs.
C) They build a new budget request from scratch, a process known as zero-based budgeting.
D) They act as an economizer.