Which of the Following Is an Example of a Line-Item

Which of the following is an example of a line-item veto?

A) issuing a signing statement that declares part of a law unconstitutional
B) waiting to sign a law for more than ten days, so it is automatically vetoed
C) vetoing some spending items in a bill while signing the rest into law
D) making a veto threat that draws a bright line describing which legislation the president will veto