The president is the single most important individual... A. in constructing federal salary schedules. B. in the authorization process. C. in constructing a national budget. D. in preventing the Zombie Apocalypse E. in the appropriations process.

C. in constructing a national budget.

Explanation:

By the law, the President is one of the key people to construct a national budget.

In February each year, President delivers the budget request to the Congress for the upcoming fiscal year (beginning from 1st of October).

Once the House and the Senate pass the resolutions, vote on them and reconcile the differences of the bills, the President signs the appropriations bills.

President can also revive these decisions, veto Congress' decisions and stop the budgetary process that has already started.

a factory opens that mass-produces light bulbs.

explanation:

not sure if that's an answer to your questions but this is an example! : )