How Are Appropriations a Good Measure of Congressional Support for a President

How are appropriations a good measure of congressional support for a president during war?

A) Presidents cannot remain silent nor can congressional members abstain from comment on presidential proposals during the appropriations process.
B) The appropriations process is identical to the traditional legislative process and provides a strong reflection of partisan support for the president.
C) Because the appropriations process is exempt from presidential vetoes, it is a reasonable gauge of congressional support.
D) The appropriations process is completely within the purview of the legislative branch and clearly illustrates whether Congress supports or opposes presidential policy.