An instruction says to complete the task soon. What should be added to make it more precise?

Correct answer: A specific deadline

The governing concept is clarity and precision in verbal instructions. The word “soon” is vague because different listeners may assign it different time limits. Adding a measurable deadline, such as “by 4 p.m. today,” removes that uncertainty and makes the instruction actionable. Option A is therefore correct; difficult words, an introduction, or an unrelated example do not define when the task must be finished.